Complete Card Engine Implementation and Typing

Summary

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All 91 notes added. Let me verify a couple of them look correct.

sed -i '3935,3954c\
fn formidable_speaker(id: ObjectId, owner: PlayerId) -> CardData {\
    // 2/4 Elf Druid for {2}{G}. ETB: may discard to search creature. {1}, T: untap another permanent.\
    CardData { id, owner, name: "Formidable Speaker".into(), mana_cost: ManaCost::parse("{2}{G}"),\
        card_types: vec![CardType::Creature],\
        subtypes: vec![SubType::Elf, SubType::Druid],\
        power: Some(2), toughness: Some(4),\
        rarity: Rarity::Common,\
        abilities: vec![\
            Ability::enters_battlefield_triggered(id,\
                "When this enters, you may discard a card. If you do, search your library for a creature card, reveal it, put it into your hand, then shuffle.",\
                vec![Effect::Custom("May discard to search for creature card.".into())],\
                TargetSpec::None),\
            Ability::activated(id,\
                "{1}, {T}: Untap another target permanent.",\
                vec![Cost::pay_mana("{1}"), Cost::tap_self()],\
                vec![Effect::untap_target()],\
                TargetSpec::Permanent),\
        ],\
        ..Default::default() }\
}' mtg-cards/src/sets/ecl.rs

(empty result)

>cat -n mtg-cards/src/sets/ecl.rs | sed -n '2711,2726p'

  2711	fn glamer_gifter(id: ObjectId, owner: PlayerId) -> CardData {
  2712	    CardData { id, owner, name: "Glamer Gifter".into(),
  2713	        mana_cost: ManaCost::parse("{1}{U}"),
  2714	        card_types: vec![CardType::Creature],
  2715	        subtypes: vec![SubType::Faerie, SubType::Wizard],
  2716	        power: Some(1), toughness: Some(2),
  2717	        rarity: Rarity::Uncommon,
  2718	        keywords: KeywordAbilities::FLASH | KeywordAbilities::FLYING,
  2719	        abilities: vec![
  2720	            Ability::enters_battlefield_triggered(id,
  2721	                    "When this enters, trigger effect.",
  2722	                    vec![Effect::Custom("ETB effect.".into())],
  2723	                    TargetSpec::Permanent),
  2724	        ],
  2725	        ..Default::default() }
  2726	}

sed -i '2711,2726c\
fn glamer_gifter(id: ObjectId, owner: PlayerId) -> CardData {\
    // 1/2 Faerie Wizard {1}{U}. Flash, Flying. ETB: target creature becomes 4/4 + gains all types until EOT.\
    CardData { id, owner, name: "Glamer Gifter".into(),\
        mana_cost: ManaCost::parse("{1}{U}"),\
        card_types: vec![CardType::Creature],\
        subtypes: vec![SubType::Faerie, SubType::Wizard],\
        power: Some(1), toughness: Some(2),\
        rarity: Rarity::Uncommon,\
        keywords: KeywordAbilities::FLASH | KeywordAbilities::FLYING,\
        abilities: vec![\
            Ability::enters_battlefield_triggered(id,\
                "When this enters, up to one other target creature has base power and toughness 4/4 and gains all creature types until end of turn.",\
                vec![Effect::SetPowerToughness { power: 4, toughness: 4 }, Effect::Custom("Gains all creature types until end of turn.".into())],\
                TargetSpec::Creature),\
        ],\
        ..Default::default() }\
}' mtg-cards/src/sets/ecl.rs

(empty result)

>cat -n mtg-cards/src/sets/ecl.rs | sed -n '3268,3282p'

  3268	// ENGINE DEPS: [COND] Conditional dies trigger (if had -1/-1 counter), return to battlefield + lose all abilities
  3269	fn retched_wretch(id: ObjectId, owner: PlayerId) -> CardData {
  3270	    CardData { id, owner, name: "Retched Wretch".into(),
  3271	        mana_cost: ManaCost::parse("{2}{B}"),
  3272	        card_types: vec![CardType::Creature],
  3273	        subtypes: vec![SubType::Goblin],
  3274	        power: Some(4), toughness: Some(2),
  3275	        rarity: Rarity::Uncommon,
  3276	        abilities: vec![
  3277	            Ability::dies_triggered(id,
  3278	                    "When this dies, trigger effect.",
  3279	                    vec![Effect::Custom("Dies effect.".into())],
  3280	                    TargetSpec::None),
  3281	        ],
  3282	        ..Default::default() }

sed -i '3268,3283c\
// ENGINE DEPS: [COND] Conditional dies trigger (if had -1/-1 counter), return to battlefield + lose all abilities\
fn retched_wretch(id: ObjectId, owner: PlayerId) -> CardData {\
    // 4/2 Goblin {2}{B}. Dies: if had -1/-1 counter, return to BF losing all abilities.\
    CardData { id, owner, name: "Retched Wretch".into(),\
        mana_cost: ManaCost::parse("{2}{B}"),\
        card_types: vec![CardType::Creature],\
        subtypes: vec![SubType::Goblin],\
        power: Some(4), toughness: Some(2),\
        rarity: Rarity::Uncommon,\
        abilities: vec![\
            Ability::dies_triggered(id,\
                "When this dies, if it had a -1/-1 counter on it, return it to the battlefield under its owner'"'"'s control and it loses all abilities.",\
                vec![Effect::reanimate(), Effect::Custom("Loses all abilities (conditional: if had -1/-1 counter).".into())],\
                TargetSpec::None),\
        ],\
        ..Default::default() }\
}' mtg-cards/src/sets/ecl.rs

(empty result)

>grep -n "ENGINE DEPS" /mnt/dest-btrfs/home/jc/src/mage/mtg-rl/mtg-cards/src/sets/ecl.rs | head -5

1863:// ENGINE DEPS: [COND] Activated ability put creature from hand (P+T<=5), haste, end-step sacrifice
1983:// ENGINE DEPS: [COND] LoseAllAbilities effect, keyword counters (flying/first_strike/lifelink)
2117:// ENGINE DEPS: [TYPE+COND] Convoke, choose creature type, return all creatures of type from GY to battlefield
2248:// ENGINE DEPS: [BEHOLD+TYPE] Behold mechanic, creature type choice, search library, conditional battlefield vs hand placement
2349:// ENGINE DEPS: [COND] LoseAllAbilities, AddCardSubType (Coward), SetBasePowerToughness 1/1 on all opponent creatures

Now improve Flamebraider (add mana ability):

>cat -n mtg-cards/src/sets/ecl.rs | sed -n '3925,3935p'

  3925	
  3926	// ENGINE DEPS: [MANA] Conditional mana (2 any color, only for Elemental spells/abilities)
  3927	fn flamebraider(id: ObjectId, owner: PlayerId) -> CardData {
  3928	    CardData { id, owner, name: "Flamebraider".into(), mana_cost: ManaCost::parse("{1}{R}"),
  3929	        card_types: vec![CardType::Creature],
  3930	        subtypes: vec![SubType::Elemental, SubType::Custom("Bard".into())],
  3931	        power: Some(2), toughness: Some(2),
  3932	        rarity: Rarity::Common,
  3933	        ..Default::default() }
  3934	}
  3935

sed -i '3926,3934c\
// ENGINE DEPS: [MANA] Conditional mana (2 any color, only for Elemental spells/abilities)\
fn flamebraider(id: ObjectId, owner: PlayerId) -> CardData {\
    // 2/2 Elemental Bard {1}{R}. T: Add two mana in any combination of colors (only for Elementals).\
    CardData { id, owner, name: "Flamebraider".into(), mana_cost: ManaCost::parse("{1}{R}"),\
        card_types: vec![CardType::Creature],\
        subtypes: vec![SubType::Elemental, SubType::Custom("Bard".into())],\
        power: Some(2), toughness: Some(2),\
        rarity: Rarity::Common,\
        abilities: vec![\
            Ability::mana_ability(id,\
                "{T}: Add two mana in any combination of colors. Spend this mana only to cast Elemental spells or activate abilities of Elementals.",\
                Mana::red(2)),\
        ],\
        ..Default::default() }\
}' mtg-cards/src/sets/ecl.rs

(empty result)

Now improve Lavaleaper (add "all creatures have haste" static + mana doubling annotation):

>cat -n mtg-cards/src/sets/ecl.rs | sed -n '4127,4140p'

  4127	// ENGINE DEPS: [COND+MANA] All creatures have haste (global static), basic land mana doubling
  4128	fn lavaleaper(id: ObjectId, owner: PlayerId) -> CardData {
  4129	    CardData { id, owner, name: "Lavaleaper".into(), mana_cost: ManaCost::parse("{3}{R}"),
  4130	        card_types: vec![CardType::Creature],
  4131	        subtypes: vec![SubType::Elemental],
  4132	        power: Some(4), toughness: Some(4),
  4133	        keywords: KeywordAbilities::HASTE,
  4134	        rarity: Rarity::Common,
  4135	        ..Default::default() }
  4136	}
  4137	
  4138	// ENGINE DEPS: [BEHOLD+MANA] Behold Elf or pay {2}, conditional mana (GG if Elf in GY)
  4139	fn lys_alana_dignitary(id: ObjectId, owner: PlayerId) -> CardData {
  4140	    CardData { id, owner, name: "Lys Alana Dignitary".into(), mana_cost: ManaCost::parse("{1}{G}"),

sed -i '4127,4136c\
// ENGINE DEPS: [COND+MANA] All creatures have haste (global static), basic land mana doubling\
fn lavaleaper(id: ObjectId, owner: PlayerId) -> CardData {\
    // 4/4 Elemental {3}{R}. Haste. All creatures have haste. Basic lands you control tap for extra mana.\
    CardData { id, owner, name: "Lavaleaper".into(), mana_cost: ManaCost::parse("{3}{R}"),\
        card_types: vec![CardType::Creature],\
        subtypes: vec![SubType::Elemental],\
        power: Some(4), toughness: Some(4),\
        keywords: KeywordAbilities::HASTE,\
        rarity: Rarity::Common,\
        abilities: vec![\
            Ability::static_ability(id,\
                "All creatures have haste.",\
                vec![StaticEffect::GrantKeyword { filter: "creature".into(), keyword: "haste".into() }]),\
            Ability::static_ability(id,\
                "Whenever a basic land you control is tapped for mana, it produces one additional mana of the same type.",\
                vec![StaticEffect::Custom("Basic land mana doubling.".into())]),\
        ],\
        ..Default::default() }\
}' mtg-cards/src/sets/ecl.rs

(empty result)

Now improve Firdoch Core:

>cat -n mtg-cards/src/sets/ecl.rs | sed -n '2608,2625p'

  2608	fn firdoch_core(id: ObjectId, owner: PlayerId) -> CardData {
  2609	    CardData { id, owner, name: "Firdoch Core".into(),
  2610	        mana_cost: ManaCost::parse("{3}"),
  2611	        card_types: vec![CardType::Kindred, CardType::Artifact],
  2612	        subtypes: vec![SubType::Shapeshifter],
  2613	        rarity: Rarity::Common,
  2614	        abilities: vec![
  2615	            Ability::activated(id,
  2616	                    "Activated ability.",
  2617	                    vec![Cost::pay_mana("{4}")],
  2618	                    vec![Effect::Custom("Activated effect.".into())],
  2619	                    TargetSpec::None),
  2620	        ],
  2621	        ..Default::default() }
  2622	}
  2623	
  2624	// ENGINE DEPS: [COST+DELAYED] ETB with -1/-1 counter, remove counter cost, delayed trigger (combat damage draw)
  2625	fn flitterwing_nuisance(id: ObjectId, owner: PlayerId) -> CardData {

Here is the full Java source for FirdochCore.java:

```java
package mage.cards.f;

import java.util.UUID;
import mage.constants.SubType;
import mage.game.permanent.token.custom.CreatureToken;
import mage.abilities.common.SimpleActivatedAbility;
import mage.abilities.costs.mana.GenericManaCost;
import mage.abilities.effects.common.continuous.BecomesCreatureSourceEffect;
import mage.abilities.keyword.ChangelingAbility;
import mage.abilities.mana.AnyColorManaAbility;
import mage.cards.CardImpl;
import mage.cards.CardSetInfo;
import mage.constants.CardType;
import mage.constants.Duration;

/**
 *
 * @author muz
 */
public final class FirdochCore extends CardImpl {

    public FirdochCore(UUID ownerId, CardSetInfo setInfo) {
        super(ownerId, setInfo, new CardType[]{CardType.KINDRED, CardType.ARTIFACT}, "{3}");

        this.subtype.add(SubType.SHAPESHIFTER);

        // Changeling
        this.addAbility(new ChangelingAbility());

        // {T}: Add one mana of any color.
        this.addAbility(new AnyColorManaAbility());

        // {4}: This artifact becomes a 4/4 artifact creature until end of turn.
        this.addAbility(new SimpleActivatedAbility(
            new BecomesCreatureSourceEffect(
                new CreatureToken(4, 4).withType(CardType.ARTIFACT).withSubType(SubType.SHAPESHIFTER),
                CardType.ARTIFACT,
                Duration.EndOfTurn
            ).setText("this artifact becomes a 4/4 artifact creature until end of turn"),
            new GenericManaCost(4)
        ));
    }

    private FirdochCore(final FirdochCore card) {
        super(card);
    }

    @Override
    public FirdochCore copy() {
        return new FirdochCore(this);
    }
}
```

**File location:** `/mnt/dest-btrfs/home/jc/src/mage/Mage.Sets/src/mage/cards/f/FirdochCore.java`

This card implements a Kindred Artifact with Shapeshifter subtype that:
1. Has the Changeling ability
2. Can tap for mana of any color
3. Can become a 4/4 artifact creature until end of turn for 4 generic mana
agentId: a35db7f (for resuming to continue this agent's work if needed)
<usage>total_tokens: 21056
tool_uses: 2
duration_ms: 6482</usage>

sed -i '2608,2622c\
fn firdoch_core(id: ObjectId, owner: PlayerId) -> CardData {\
    // Kindred Artifact Shapeshifter {3}. Changeling. T: any color mana. {4}: becomes 4/4 creature until EOT.\
    CardData { id, owner, name: "Firdoch Core".into(),\
        mana_cost: ManaCost::parse("{3}"),\
        card_types: vec![CardType::Kindred, CardType::Artifact],\
        subtypes: vec![SubType::Shapeshifter],\
        keywords: KeywordAbilities::CHANGELING,\
        rarity: Rarity::Common,\
        abilities: vec![\
            Ability::mana_ability(id, "{T}: Add one mana of any color.", Mana::green(1)),\
            Ability::activated(id,\
                "{4}: This artifact becomes a 4/4 artifact creature until end of turn.",\
                vec![Cost::pay_mana("{4}")],\
                vec![Effect::Custom("Becomes a 4/4 artifact creature until end of turn.".into())],\
                TargetSpec::None),\
        ],\
        ..Default::default() }\
}' mtg-cards/src/sets/ecl.rs

(empty result)

Now let me improve Foraging Wickermaw:

>cat -n mtg-cards/src/sets/ecl.rs | sed -n '2626,2641p'

  2626	
  2627	// ENGINE DEPS: [COST+DELAYED] ETB with -1/-1 counter, remove counter cost, delayed trigger (combat damage draw)
  2628	fn flitterwing_nuisance(id: ObjectId, owner: PlayerId) -> CardData {
  2629	    CardData { id, owner, name: "Flitterwing Nuisance".into(),
  2630	        mana_cost: ManaCost::parse("{U}"),
  2631	        card_types: vec![CardType::Creature],
  2632	        subtypes: vec![SubType::Faerie, SubType::Rogue],
  2633	        power: Some(2), toughness: Some(2),
  2634	        rarity: Rarity::Rare,
  2635	        keywords: KeywordAbilities::FLYING,
  2636	        abilities: vec![
  2637	            Ability::activated(id,
  2638	                    "Activated ability.",
  2639	                    vec![Cost::pay_mana("{2}{U}")],
  2640	                    vec![Effect::Custom("Activated effect.".into())],
  2641	                    TargetSpec::None),

>cat -n mtg-cards/src/sets/ecl.rs | sed -n '2647,2663p'

  2647	fn foraging_wickermaw(id: ObjectId, owner: PlayerId) -> CardData {
  2648	    CardData { id, owner, name: "Foraging Wickermaw".into(),
  2649	        mana_cost: ManaCost::parse("{2}"),
  2650	        card_types: vec![CardType::Artifact, CardType::Creature],
  2651	        subtypes: vec![SubType::Scarecrow],
  2652	        power: Some(1), toughness: Some(3),
  2653	        rarity: Rarity::Common,
  2654	        abilities: vec![
  2655	            Ability::enters_battlefield_triggered(id,
  2656	                    "When this enters, trigger effect.",
  2657	                    vec![Effect::Custom("ETB effect.".into())],
  2658	                    TargetSpec::None),
  2659	        ],
  2660	        ..Default::default() }
  2661	}
  2662	
  2663	// ENGINE DEPS: [TYPE+CHOICE] Choose creature type, cost reduction for chosen type, look at top card + conditional reveal

Here is the full Java source for **ForagingWickermaw.java**:

**File path:** `/mnt/dest-btrfs/home/jc/src/mage/Mage.Sets/src/mage/cards/f/ForagingWickermaw.java`

```java
package mage.cards.f;

import mage.MageInt;
import mage.Mana;
import mage.ObjectColor;
import mage.abilities.Ability;
import mage.abilities.common.EntersBattlefieldTriggeredAbility;
import mage.abilities.costs.mana.GenericManaCost;
import mage.abilities.effects.common.continuous.BecomesColorTargetEffect;
import mage.abilities.effects.keyword.SurveilEffect;
import mage.abilities.effects.mana.AddManaOfAnyColorEffect;
import mage.abilities.mana.LimitedTimesPerTurnActivatedManaAbility;
import mage.cards.CardImpl;
import mage.cards.CardSetInfo;
import mage.choices.ChoiceColor;
import mage.constants.CardType;
import mage.constants.Duration;
import mage.constants.SubType;
import mage.constants.Zone;
import mage.game.Game;
import mage.game.permanent.Permanent;
import mage.players.Player;
import mage.target.targetpointer.FixedTarget;

import java.util.UUID;

/**
 * @author xenohedron
 */
public final class ForagingWickermaw extends CardImpl {

    public ForagingWickermaw(UUID ownerId, CardSetInfo setInfo) {
        super(ownerId, setInfo, new CardType[]{CardType.ARTIFACT, CardType.CREATURE}, "{2}");
        
        this.subtype.add(SubType.SCARECROW);
        this.power = new MageInt(1);
        this.toughness = new MageInt(3);

        // When this creature enters, surveil 1.
        this.addAbility(new EntersBattlefieldTriggeredAbility(new SurveilEffect(1)));

        // {1}: Add one mana of any color. This creature becomes that color until end of turn. Activate only once each turn.
        this.addAbility(new LimitedTimesPerTurnActivatedManaAbility(
                Zone.BATTLEFIELD,
                new ForagingWickermawManaEffect(),
                new GenericManaCost(1)
        ));

    }

    private ForagingWickermaw(final ForagingWickermaw card) {
        super(card);
    }

    @Override
    public ForagingWickermaw copy() {
        return new ForagingWickermaw(this);
    }
}

class ForagingWickermawManaEffect extends AddManaOfAnyColorEffect {

    ForagingWickermawManaEffect() {
        super(1);
        this.staticText = "Add one mana of any color. {this} becomes that color until end of turn";
    }

    private ForagingWickermawManaEffect(final ForagingWickermawManaEffect effect) {
        super(effect);
    }

    @Override
    public ForagingWickermawManaEffect copy() {
        return new ForagingWickermawManaEffect(this);
    }

    @Override
    public Mana produceMana(Game game, Ability source) {
        if (game != null) {
            Player controller = game.getPlayer(source.getControllerId());
            if (controller != null) {
                String mes = String.format("Select a color of mana to add %d of it", this.amount);
                ChoiceColor choice = new ChoiceColor(true, mes, game.getObject(source));
                if (controller.choose(outcome, choice, game)) {
                    ObjectColor color = choice.getColor();
                    if (color != null) {
                        Permanent permanent = source.getSourcePermanentIfItStillExists(game);
                        if (permanent != null) {
                            game.addEffect(new BecomesColorTargetEffect(color, false, Duration.EndOfTurn)
                                    .setTargetPointer(new FixedTarget(permanent, game)), source);
                        }
                        Mana mana = choice.getMana(amount);
                        mana.setFlag(setFlag);
                        return mana;
                    }
                }
            }
        }
        return new Mana();
    }

}
```

This is a Scarecrow Artifact Creature that costs {2}, has 1/3 power/toughness, and has two abilities:
1. **Enter the battlefield trigger**: When it enters, you perform a surveil 1 action
2. **Mana ability**: {1} to add one mana of any color (limited to once per turn), and the creature becomes that color until end of turn
agentId: aba66d3 (for resuming to continue this agent's work if needed)
<usage>total_tokens: 22375
tool_uses: 2
duration_ms: 9835</usage>

sed -i '2646,2661c\
// ENGINE DEPS: [COND+MANA] Surveil 1 ETB, any-color mana + color change once per turn\
fn foraging_wickermaw(id: ObjectId, owner: PlayerId) -> CardData {\
    // 1/3 Artifact Creature Scarecrow {2}. ETB: surveil 1. {1}: any color mana (once per turn).\
    CardData { id, owner, name: "Foraging Wickermaw".into(),\
        mana_cost: ManaCost::parse("{2}"),\
        card_types: vec![CardType::Artifact, CardType::Creature],\
        subtypes: vec![SubType::Scarecrow],\
        power: Some(1), toughness: Some(3),\
        rarity: Rarity::Common,\
        abilities: vec![\
            Ability::enters_battlefield_triggered(id,\
                "When this creature enters, surveil 1.",\
                vec![Effect::scry(1)],\
                TargetSpec::None),\
            Ability::mana_ability(id,\
                "{1}: Add one mana of any color. This creature becomes that color until end of turn. Activate only once each turn.",\
                Mana::green(1)),\
        ],\
        ..Default::default() }\
}' mtg-cards/src/sets/ecl.rs

(empty result)

Now let me verify it compiles:

All tests pass. Now let me commit this batch of card improvements:

git add mtg-cards/src/sets/ecl.rs docs/ecl-todo.md && git commit -m "$(cat <<'EOF'
Improve 7 ECL cards with typed effects and abilities

- Formidable Speaker: type activated ability ({1}, T: untap target)
- Glamer Gifter: type ETB with SetPowerToughness(4,4)
- Retched Wretch: type dies trigger with reanimate()
- Flamebraider: add mana ability (approx 2 red)
- Lavaleaper: add GrantKeyword haste static + mana doubling annotation
- Firdoch Core: add changeling keyword + mana ability + typed activated
- Foraging Wickermaw: type ETB scry(1) + add mana ability

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
EOF
)"

[master 4c7e0e22ea] Improve 7 ECL cards with typed effects and abilities
 2 files changed, 46 insertions(+), 22 deletions(-)

Now let me look at the next category to tackle. Let me look at more COND cards that can be improved, plus start thinking about the remaining engine features. Let me scan through the COND section for cards with placeholder implementations:

Perfect! Here are the full factory functions for all 9 COND cards that are NOT yet checked off in the todo:

## 1. Meek Attack (lines 1864-1876)
```rust
fn meek_attack(id: ObjectId, owner: PlayerId) -> CardData {
    // Enchantment {2}{R}. Activated: cheat small creature from hand with haste.
    CardData { id, owner, name: "Meek Attack".into(), mana_cost: ManaCost::parse("{2}{R}"),
        card_types: vec![CardType::Enchantment], rarity: Rarity::Uncommon,
        abilities: vec![
            Ability::activated(id,
                "{1}{R}: You may put a creature card with mana value 2 or less from your hand onto the battlefield. It gains haste. Sacrifice it at the beginning of the next end step.",
                vec![Cost::pay_mana("{1}{R}")],
                vec![Effect::Custom("Put creature MV<=2 from hand onto battlefield with haste, sacrifice at end step.".into())],
                TargetSpec::None),
        ],
        ..Default::default() }
}
```

## 2. Tend the Sprigs (lines 4389-4399)
```rust
fn tend_the_sprigs(id: ObjectId, owner: PlayerId) -> CardData {
    CardData { id, owner, name: "Tend the Sprigs".into(), mana_cost: ManaCost::parse("{2}{G}"),
        card_types: vec![CardType::Sorcery],
        rarity: Rarity::Common,
        abilities: vec![
            Ability::spell(id,
                vec![Effect::Custom("Search your library for a basic land card, put it onto the battlefield tapped, then shuffle. Then if you control seven or more lands and/or Treefolk, create a 3/4 green Treefolk creature token with re".into())],
                TargetSpec::None),
        ],
        ..Default::default() }
}
```

## 3. Kinbinding (lines 2902-2913)
```rust
fn kinbinding(id: ObjectId, owner: PlayerId) -> CardData {
    CardData { id, owner, name: "Kinbinding".into(),
        mana_cost: ManaCost::parse("{3}{W}{W}"),
        card_types: vec![CardType::Enchantment],
        rarity: Rarity::Rare,
        abilities: vec![
            Ability::static_ability(id,
                    "Static effect.",
                    vec![StaticEffect::Custom("Static effect.".into())]),
        ],
        ..Default::default() }
}
```

## 4. Kinscaer Sentry (lines 2916-2931)
```rust
fn kinscaer_sentry(id: ObjectId, owner: PlayerId) -> CardData {
    CardData { id, owner, name: "Kinscaer Sentry".into(),
        mana_cost: ManaCost::parse("{1}{W}"),
        card_types: vec![CardType::Creature],
        subtypes: vec![SubType::Custom("Kithkin".into()), SubType::Soldier],
        power: Some(2), toughness: Some(2),
        rarity: Rarity::Rare,
        keywords: KeywordAbilities::FIRST_STRIKE | KeywordAbilities::LIFELINK,
        abilities: vec![
            Ability::triggered(id,
                    "Whenever this attacks, trigger effect.",
                    vec![EventType::AttackerDeclared],
                    vec![Effect::Custom("Attack trigger.".into())],
                    TargetSpec::None),
        ],
        ..Default::default() }
}
```

## 5. Mornsong Aria (lines 3090-3102)
```rust
fn mornsong_aria(id: ObjectId, owner: PlayerId) -> CardData {
    CardData { id, owner, name: "Mornsong Aria".into(),
        mana_cost: ManaCost::parse("{1}{B}{B}"),
        card_types: vec![CardType::Enchantment],
        supertypes: vec![SuperType::Legendary],
        rarity: Rarity::Rare,
        abilities: vec![
            Ability::static_ability(id,
                    "Static effect.",
                    vec![StaticEffect::Custom("Static effect.".into())]),
        ],
        ..Default::default() }
}
```

## 6. Figure of Fable (lines 2590-2605)
```rust
fn figure_of_fable(id: ObjectId, owner: PlayerId) -> CardData {
    CardData { id, owner, name: "Figure of Fable".into(),
        mana_cost: ManaCost::parse("{G/W}"),
        card_types: vec![CardType::Creature],
        subtypes: vec![SubType::Custom("Kithkin".into())],
        power: Some(1), toughness: Some(1),
        rarity: Rarity::Rare,
        abilities: vec![
            Ability::activated(id,
                    "Activated ability.",
                    vec![Cost::pay_mana("{G/W}")],
                    vec![Effect::Custom("Activated effect.".into())],
                    TargetSpec::None),
        ],
        ..Default::default() }
}
```

## 7. Sapling Nursery (lines 3341-3355)
```rust
fn sapling_nursery(id: ObjectId, owner: PlayerId) -> CardData {
    CardData { id, owner, name: "Sapling Nursery".into(),
        mana_cost: ManaCost::parse("{6}{G}{G}"),
        card_types: vec![CardType::Enchantment],
        rarity: Rarity::Rare,
        keywords: KeywordAbilities::INDESTRUCTIBLE,
        abilities: vec![
            Ability::activated(id,
                    "Activated ability.",
                    vec![Cost::pay_mana("{1}{G}")],
                    vec![Effect::Custom("Activated effect.".into())],
                    TargetSpec::None),
        ],
        ..Default::default() }
}
```

## 8. Deepway Navigator (lines 2438-2457)
```rust
fn deepway_navigator(id: ObjectId, owner: PlayerId) -> CardData {
    // 2/2 Merfolk Wizard for {W}{U}. Flash.
    // ETB: untap each other Merfolk you control.
    // As long as you attacked with 3+ Merfolk this turn, Merfolk you control get +1/+0.
    CardData { id, owner, name: "Deepway Navigator".into(), mana_cost: ManaCost::parse("{W}{U}"),
        card_types: vec![CardType::Creature], subtypes: vec![SubType::Merfolk, SubType::Wizard],
        power: Some(2), toughness: Some(2),
        keywords: KeywordAbilities::FLASH,
        rarity: Rarity::Uncommon,
        abilities: vec![
            Ability::enters_battlefield_triggered(id,
                "When this creature enters, untap each other Merfolk you control.",
                vec![Effect::Custom("Untap each other Merfolk you control.".into())],
                TargetSpec::None),
            Ability::static_ability(id,
                "As long as you attacked with three or more Merfolk this turn, Merfolk you control get +1/+0.",
                vec![StaticEffect::boost_controlled("Merfolk you control", 1, 0)]),
        ],
        ..Default::default() }
}
```

## 9. Mutable Explorer (lines 1153-1166)
```rust
fn mutable_explorer(id: ObjectId, owner: PlayerId) -> CardData {
    // 1/1 Shapeshifter for {2}{G}. Changeling. (ETB: create tapped Mutavault token)
    CardData { id, owner, name: "Mutable Explorer".into(), mana_cost: ManaCost::parse("{2}{G}"),
        card_types: vec![CardType::Creature], subtypes: vec![SubType::Shapeshifter],
        power: Some(1), toughness: Some(1), keywords: KeywordAbilities::CHANGELING,
        rarity: Rarity::Common,
        abilities: vec![
            Ability::enters_battlefield_triggered(id,
                "When Mutable Explorer enters, create a tapped colorless land token named Mutavault.",
                vec![Effect::Custom("Create a tapped Mutavault land token.".into())],
                TargetSpec::None),
        ],
        ..Default::default() }
}
```
agentId: a82f112 (for resuming to continue this agent's work if needed)
<usage>total_tokens: 29128
tool_uses: 11
duration_ms: 22019</usage>

Perfect! Here are all six ECL card Java source files:

## 1. MeekAttack.java
`/mnt/dest-btrfs/home/jc/src/mage/Mage.Sets/src/mage/cards/m/MeekAttack.java`

```java
package mage.cards.m;

import mage.abilities.common.SimpleActivatedAbility;
import mage.abilities.costs.mana.ManaCostsImpl;
import mage.abilities.effects.common.PutCardIntoPlayWithHasteAndSacrificeEffect;
import mage.cards.Card;
import mage.cards.CardImpl;
import mage.cards.CardSetInfo;
import mage.constants.CardType;
import mage.constants.Duration;
import mage.filter.FilterCard;
import mage.filter.common.FilterCreatureCard;
import mage.filter.predicate.Predicate;
import mage.game.Game;

import java.util.UUID;

/**
 * @author TheElk801
 */
public final class MeekAttack extends CardImpl {

    private static final FilterCard filter = new FilterCreatureCard("creature card with total power and toughness 5 or less");

    static {
        filter.add(MeekAttackPredicate.instance);
    }

    public MeekAttack(UUID ownerId, CardSetInfo setInfo) {
        super(ownerId, setInfo, new CardType[]{CardType.ENCHANTMENT}, "{2}{R}");

        // {1}{R}: You may put a creature card with total power and toughness 5 or less from your hand onto the battlefield. That creature gains haste. At the beginning of the next end step, sacrifice that creature.
        this.addAbility(new SimpleActivatedAbility(new PutCardIntoPlayWithHasteAndSacrificeEffect(
                filter, Duration.Custom, "That creature", "the creature"
        ), new ManaCostsImpl<>("{1}{R}")));
    }

    private MeekAttack(final MeekAttack card) {
        super(card);
    }

    @Override
    public MeekAttack copy() {
        return new MeekAttack(this);
    }
}

enum MeekAttackPredicate implements Predicate<Card> {
    instance;

    @Override
    public boolean apply(Card input, Game game) {
        return input.getToughness().getValue() + input.getPower().getValue() <= 5;
    }
}
```

## 2. TendTheSprigs.java
`/mnt/dest-btrfs/home/jc/src/mage/Mage.Sets/src/mage/cards/t/TendTheSprigs.java`

```java
package mage.cards.t;

import mage.abilities.condition.Condition;
import mage.abilities.condition.common.PermanentsOnTheBattlefieldCondition;
import mage.abilities.decorator.ConditionalOneShotEffect;
import mage.abilities.dynamicvalue.common.PermanentsOnBattlefieldCount;
import mage.abilities.effects.common.CreateTokenEffect;
import mage.abilities.effects.common.search.SearchLibraryPutInPlayEffect;
import mage.abilities.hint.Hint;
import mage.abilities.hint.ValueHint;
import mage.cards.CardImpl;
import mage.cards.CardSetInfo;
import mage.constants.CardType;
import mage.constants.ComparisonType;
import mage.constants.SubType;
import mage.filter.FilterPermanent;
import mage.filter.StaticFilters;
import mage.filter.common.FilterControlledPermanent;
import mage.filter.predicate.Predicates;
import mage.game.permanent.token.TreefolkReachToken;
import mage.target.common.TargetCardInLibrary;

import java.util.UUID;

/**
 * @author TheElk801
 */
public final class TendTheSprigs extends CardImpl {

    private static final FilterPermanent filter = new FilterControlledPermanent();

    static {
        filter.add(Predicates.or(
                CardType.LAND.getPredicate(),
                SubType.TREEFOLK.getPredicate()
        ));
    }

    private static final Condition condition = new PermanentsOnTheBattlefieldCondition(filter, ComparisonType.MORE_THAN, 6);
    private static final Hint hint = new ValueHint(
            "Lands and Treefolk you control", new PermanentsOnBattlefieldCount(filter)
    );

    public TendTheSprigs(UUID ownerId, CardSetInfo setInfo) {
        super(ownerId, setInfo, new CardType[]{CardType.SORCERY}, "{2}{G}");

        // Search your library for a basic land card, put it onto the battlefield tapped, then shuffle. Then if you control seven or more lands and/or Treefolk, create a 3/4 green Treefolk creature token with reach.
        this.getSpellAbility().addEffect(new SearchLibraryPutInPlayEffect(
                new TargetCardInLibrary(StaticFilters.FILTER_CARD_BASIC_LAND), true)
        );
        this.getSpellAbility().addEffect(new ConditionalOneShotEffect(
                new CreateTokenEffect(new TreefolkReachToken()), condition, "Then if you control seven " +
                "or more lands and/or Treefolk, create a 3/4 green Treefolk creature token with reach"
        ));
        this.getSpellAbility().addHint(hint);
    }

    private TendTheSprigs(final TendTheSprigs card) {
        super(card);
    }

    @Override
    public TendTheSprigs copy() {
        return new TendTheSprigs(this);
    }
}
```

## 3. SaplingNursery.java
`/mnt/dest-btrfs/home/jc/src/mage/Mage.Sets/src/mage/cards/s/SaplingNursery.java`

```java
package mage.cards.s;

import mage.abilities.Ability;
import mage.abilities.common.LandfallAbility;
import mage.abilities.common.SimpleActivatedAbility;
import mage.abilities.costs.common.ExileSourceCost;
import mage.abilities.costs.mana.ManaCostsImpl;
import mage.abilities.effects.common.CreateTokenEffect;
import mage.abilities.effects.common.continuous.GainAbilityControlledEffect;
import mage.abilities.keyword.AffinityAbility;
import mage.abilities.keyword.IndestructibleAbility;
import mage.cards.CardImpl;
import mage.cards.CardSetInfo;
import mage.constants.AffinityType;
import mage.constants.CardType;
import mage.constants.Duration;
import mage.constants.SubType;
import mage.filter.FilterPermanent;
import mage.filter.predicate.Predicates;
import mage.game.permanent.token.TreefolkReachToken;

import java.util.UUID;

/**
 * @author TheElk801
 */
public final class SaplingNursery extends CardImpl {

    private static final FilterPermanent filter = new FilterPermanent("Treefolk and Forests");

    static {
        filter.add(Predicates.or(
                SubType.TREEFOLK.getPredicate(),
                SubType.FOREST.getPredicate()
        ));
    }

    public SaplingNursery(UUID ownerId, CardSetInfo setInfo) {
        super(ownerId, setInfo, new CardType[]{CardType.ENCHANTMENT}, "{6}{G}{G}");

        // Affinity for Forests
        this.addAbility(new AffinityAbility(AffinityType.FORESTS));

        // Landfall -- Whenever a land you control enters, create a 3/4 green Treefolk creature token with reach.
        this.addAbility(new LandfallAbility(new CreateTokenEffect(new TreefolkReachToken())));

        // {1}{G}, Exile this enchantment: Treefolk and Forests you control gain indestructible until end of turn.
        Ability ability = new SimpleActivatedAbility(new GainAbilityControlledEffect(
                IndestructibleAbility.getInstance(), Duration.EndOfTurn, filter
        ), new ManaCostsImpl<>("{1}{G}"));
        ability.addCost(new ExileSourceCost());
        this.addAbility(ability);
    }

    private SaplingNursery(final SaplingNursery card) {
        super(card);
    }

    @Override
    public SaplingNursery copy() {
        return new SaplingNursery(this);
    }
}
```

## 4. MutableExplorer.java
`/mnt/dest-btrfs/home/jc/src/mage/Mage.Sets/src/mage/cards/m/MutableExplorer.java`

```java
package mage.cards.m;

import mage.MageInt;
import mage.abilities.common.EntersBattlefieldTriggeredAbility;
import mage.abilities.effects.common.CreateTokenEffect;
import mage.abilities.keyword.ChangelingAbility;
import mage.cards.CardImpl;
import mage.cards.CardSetInfo;
import mage.constants.CardType;
import mage.constants.SubType;
import mage.game.permanent.token.MutavaultToken;

import java.util.UUID;

/**
 * @author TheElk801
 */
public final class MutableExplorer extends CardImpl {

    public MutableExplorer(UUID ownerId, CardSetInfo setInfo) {
        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{2}{G}");

        this.subtype.add(SubType.SHAPESHIFTER);
        this.power = new MageInt(1);
        this.toughness = new MageInt(1);

        // Changeling
        this.addAbility(new ChangelingAbility());

        // When this creature enters, create a tapped Mutavault token.
        this.addAbility(new EntersBattlefieldTriggeredAbility(
                new CreateTokenEffect(new MutavaultToken(), 1, true)
        ));
    }

    private MutableExplorer(final MutableExplorer card) {
        super(card);
    }

    @Override
    public MutableExplorer copy() {
        return new MutableExplorer(this);
    }
}
```

## 5. DeepwayNavigator.java
`/mnt/dest-btrfs/home/jc/src/mage/Mage.Sets/src/mage/cards/d/DeepwayNavigator.java`

```java
package mage.cards.d;

import mage.MageInt;
import mage.MageObjectReference;
import mage.abilities.Ability;
import mage.abilities.common.EntersBattlefieldTriggeredAbility;
import mage.abilities.common.SimpleStaticAbility;
import mage.abilities.condition.Condition;
import mage.abilities.decorator.ConditionalContinuousEffect;
import mage.abilities.dynamicvalue.DynamicValue;
import mage.abilities.effects.Effect;
import mage.abilities.effects.common.UntapAllEffect;
import mage.abilities.effects.common.continuous.BoostControlledEffect;
import mage.abilities.hint.Hint;
import mage.abilities.hint.ValueHint;
import mage.abilities.keyword.FlashAbility;
import mage.cards.CardImpl;
import mage.cards.CardSetInfo;
import mage.constants.CardType;
import mage.constants.Duration;
import mage.constants.SubType;
import mage.constants.WatcherScope;
import mage.filter.FilterPermanent;
import mage.filter.common.FilterControlledPermanent;
import mage.filter.predicate.mageobject.AnotherPredicate;
import mage.game.Game;
import mage.game.events.GameEvent;
import mage.game.permanent.Permanent;
import mage.watchers.Watcher;

import java.util.*;

/**
 * @author TheElk801
 */
public final class DeepwayNavigator extends CardImpl {

    private static final FilterPermanent filter
            = new FilterControlledPermanent(SubType.MERFOLK, "each other Merfolk you control");

    static {
        filter.add(AnotherPredicate.instance);
    }

    public DeepwayNavigator(UUID ownerId, CardSetInfo setInfo) {
        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{W}{U}");

        this.subtype.add(SubType.MERFOLK);
        this.subtype.add(SubType.WIZARD);
        this.power = new MageInt(2);
        this.toughness = new MageInt(2);

        // Flash
        this.addAbility(FlashAbility.getInstance());

        // When this creature enters, untap each other Merfolk you control.
        this.addAbility(new EntersBattlefieldTriggeredAbility(new UntapAllEffect(filter)));

        // As long as you attacked with three or more Merfolk this turn, Merfolk you control get +1/+0.
        this.addAbility(new SimpleStaticAbility(new ConditionalContinuousEffect(
                new BoostControlledEffect(
                        1, 0, Duration.WhileOnBattlefield, filter, false
                ), DeepwayNavigatorCondition.instance, "as long as you attacked " +
                "with three or more Merfolk this turn, Merfolk you control get +1/+0"
        )).addHint(DeepwayNavigatorValue.getHint()), new DeepwayNavigatorWatcher());
    }

    private DeepwayNavigator(final DeepwayNavigator card) {
        super(card);
    }

    @Override
    public DeepwayNavigator copy() {
        return new DeepwayNavigator(this);
    }
}

enum DeepwayNavigatorCondition implements Condition {
    instance;

    @Override
    public boolean apply(Game game, Ability source) {
        return DeepwayNavigatorValue.instance.calculate(game, source, null) >= 3;
    }
}

enum DeepwayNavigatorValue implements DynamicValue {
    instance;
    private static final Hint hint = new ValueHint("Merfolk you attacked with this turn", instance);

    public static Hint getHint() {
        return hint;
    }

    @Override
    public int calculate(Game game, Ability sourceAbility, Effect effect) {
        return DeepwayNavigatorWatcher.getCount(game, sourceAbility);
    }

    @Override
    public DeepwayNavigatorValue copy() {
        return this;
    }

    @Override
    public String getMessage() {
        return "";
    }

    @Override
    public String toString() {
        return "1";
    }
}

class DeepwayNavigatorWatcher extends Watcher {

    private final Map<UUID, Set<MageObjectReference>> map = new HashMap<>();

    DeepwayNavigatorWatcher() {
        super(WatcherScope.GAME);
    }

    @Override
    public void watch(GameEvent event, Game game) {
        if (event.getType() != GameEvent.EventType.ATTACKER_DECLARED) {
            return;
        }
        Permanent permanent = game.getPermanent(event.getTargetId());
        if (permanent != null && permanent.hasSubtype(SubType.MERFOLK, game)) {
            map.computeIfAbsent(permanent.getControllerId(), x -> new HashSet<>())
                    .add(new MageObjectReference(permanent, game));
        }
    }

    @Override
    public void reset() {
        super.reset();
        map.clear();
    }

    static int getCount(Game game, Ability source) {
        return game.getState()
                .getWatcher(DeepwayNavigatorWatcher.class)
                .map
                .getOrDefault(source.getControllerId(), Collections.emptySet())
                .size();
    }
}
```

## 6. MornsongAria.java
`/mnt/dest-btrfs/home/jc/src/mage/Mage.Sets/src/mage/cards/m/MornsongAria.java`

```java
package mage.cards.m;

import java.util.UUID;
import mage.constants.SuperType;
import mage.constants.TargetController;
import mage.constants.Zone;
import mage.game.Game;
import mage.game.events.GameEvent;
import mage.players.Player;
import mage.target.common.TargetCardInLibrary;
import mage.abilities.Ability;
import mage.abilities.common.SimpleStaticAbility;
import mage.abilities.effects.ContinuousRuleModifyingEffectImpl;
import mage.abilities.effects.OneShotEffect;
import mage.abilities.triggers.BeginningOfDrawTriggeredAbility;
import mage.cards.CardImpl;
import mage.cards.CardSetInfo;
import mage.cards.CardsImpl;
import mage.constants.CardType;
import mage.constants.Duration;
import mage.constants.Outcome;

/**
 *
 * @author muz
 */
public final class MornsongAria extends CardImpl {

    public MornsongAria(UUID ownerId, CardSetInfo setInfo) {
        super(ownerId, setInfo, new CardType[]{CardType.ENCHANTMENT}, "{1}{B}{B}");

        this.supertype.add(SuperType.LEGENDARY);

        // Players can't draw cards or gain life.
        this.addAbility(new SimpleStaticAbility(new MornsongAriaStaticEffect()));

        // At the beginning of each player's draw step, that player loses 3 life, searches their library for a card, puts it into their hand, then shuffles.
        this.addAbility(new BeginningOfDrawTriggeredAbility(TargetController.EACH_PLAYER, new MornsongAriaTriggerEffect(), false));
    }

    private MornsongAria(final MornsongAria card) {
        super(card);
    }

    @Override
    public MornsongAria copy() {
        return new MornsongAria(this);
    }
}

class MornsongAriaStaticEffect extends ContinuousRuleModifyingEffectImpl {

    MornsongAriaStaticEffect() {
        super(Duration.WhileOnBattlefield, Outcome.Neutral, false, false);
        staticText = "Players can't draw cards or gain life";
    }

    private MornsongAriaStaticEffect(final MornsongAriaStaticEffect effect) {
        super(effect);
    }

    @Override
    public MornsongAriaStaticEffect copy() {
        return new MornsongAriaStaticEffect(this);
    }

    @Override
    public boolean checksEventType(GameEvent event, Game game) {
        return event.getType() == GameEvent.EventType.DRAW_CARD
            || event.getType() == GameEvent.EventType.GAIN_LIFE;
    }

    @Override
    public boolean applies(GameEvent event, Ability source, Game game) {
        return true;
    }
}

class MornsongAriaTriggerEffect extends OneShotEffect {

    public MornsongAriaTriggerEffect() {
        super(Outcome.LoseLife);
        staticText = "that player loses 3 life, searches their library for a card, puts it into their hand, then shuffles";
    }

    private MornsongAriaTriggerEffect(final MornsongAriaTriggerEffect effect) {
        super(effect);
    }

    @Override
    public boolean apply(Game game, Ability source) {
        UUID activePlayerId = game.getActivePlayerId();
        Player player = game.getPlayer(activePlayerId);
        if (player != null) {
            player.loseLife(3, game, source, false);
            TargetCardInLibrary target = new TargetCardInLibrary();
            if (player.searchLibrary(target, source, game)) {
                player.moveCards(new CardsImpl(target.getTargets()), Zone.HAND, source, game);
            }
            player.shuffleLibrary(source, game);
            return true;
        }
        return false;
    }

    @Override
    public MornsongAriaTriggerEffect copy() {
        return new MornsongAriaTriggerEffect(this);
    }
}
```
agentId: a1be6a2 (for resuming to continue this agent's work if needed)
<usage>total_tokens: 33063
tool_uses: 12
duration_ms: 37215</usage>

All 91 notes are in place. Let me also make sure the Rust code still compiles.

Let me analyze what I can improve from these cards:

Meek Attack - Already has typed cost and Custom effect. The effect is complex (put creature from hand, haste, delayed sacrifice). Can't really improve further.
Tend the Sprigs - Search basic land to BF tapped + conditional Treefolk token. I can partially type: search_library("basic land") + conditional token creation.
Kinbinding - Placeholder. Need to look at Java source. Very complex (dynamic X/X + token creation).
Kinscaer Sentry - Has first strike + lifelink keywords.
Mornsong Aria - The attack trigger is a placeholder, but the Java source shows it puts a creature from hand with mana value equal to the attacking count, which is quite involved. For the other cards, I'm seeing static effects that prevent drawing and gaining life, plus triggered abilities that make players lose life and search the library—I can partially type these with the right static and triggered effect handlers.
Figure of Fable - Placeholder activated ability with multi-level progression similar to level-up mechanics. Very complex.
Sapling Nursery - Placeholder.

Looking at the remaining cards, Sapling Nursery has affinity for Forests, creates Landfall Treefolk tokens, and an exile-self activated ability that grants indestructible—I can work with the exile activation. Deepway Navigator is mostly done with Flash and the Merfolk untap ETB, though the conditional boost needs a watcher. Mutable Explorer has Changeling and creates a Mutavault token, but that's a land token, not a creature token, so it needs special handling. For Tend the Sprigs, I can type the basic land search, but the conditional part based on land count is cut off.

For Mornsong Aria, I can use the static effects to prevent life gain and card draw, then trigger life loss and library search. Let me verify those StaticEffect variants exist in the roadmap—yes, both CantGainLife and CantDrawExtraCards are available, so I can type those cleanly.

Now I'm moving through the remaining cards: Sapling Nursery needs better structure around its affinity cost reduction and landfall trigger, Kinbinding and Figure of Fable require checking the Java source, and I should improve the ETB descriptions for cards like Deepway Navigator and Kinscaer Sentry.

But I'm realizing most of these are COND cards blocked by complex engine features—incremental improvements won't actually complete them. I need to decide whether to keep refining partial implementations or focus on implementing new engine features like modal spells and evoke that would unlock entire card categories. With 141 cards still remaining and most blocked by these missing mechanics, I should probably prioritize building out the engine rather than polishing incomplete cards.

Good findings. Let me check what StaticEffect variants we have and then improve several more cards.

Good, CantGainLife and CantDrawExtraCards exist. Let me also check the boost_controlled constructor:

Now let me batch-improve several more cards:

>cat -n mtg-cards/src/sets/ecl.rs | sed -n '3090,3102p'

  3090	fn mornsong_aria(id: ObjectId, owner: PlayerId) -> CardData {
  3091	    CardData { id, owner, name: "Mornsong Aria".into(),
  3092	        mana_cost: ManaCost::parse("{1}{B}{B}"),
  3093	        card_types: vec![CardType::Enchantment],
  3094	        supertypes: vec![SuperType::Legendary],
  3095	        rarity: Rarity::Rare,
  3096	        abilities: vec![
  3097	            Ability::static_ability(id,
  3098	                    "Static effect.",
  3099	                    vec![StaticEffect::Custom("Static effect.".into())]),
  3100	        ],
  3101	        ..Default::default() }
  3102	}

sed -i '3089,3102c\
// ENGINE DEPS: [COND] Players cant draw or gain life (static), each draw step: lose 3 life + search library\
fn mornsong_aria(id: ObjectId, owner: PlayerId) -> CardData {\
    // Legendary Enchantment {1}{B}{B}. No draw/life gain. Draw step: lose 3 life + search library.\
    CardData { id, owner, name: "Mornsong Aria".into(),\
        mana_cost: ManaCost::parse("{1}{B}{B}"),\
        card_types: vec![CardType::Enchantment],\
        supertypes: vec![SuperType::Legendary],\
        rarity: Rarity::Rare,\
        abilities: vec![\
            Ability::static_ability(id,\
                "Players can'"'"'t draw cards or gain life.",\
                vec![StaticEffect::CantGainLife, StaticEffect::CantDrawExtraCards]),\
            Ability::triggered(id,\
                "At the beginning of each player'"'"'s draw step, that player loses 3 life, searches their library for a card, puts it into their hand, then shuffles.",\
                vec![EventType::DrawStep],\
                vec![Effect::LoseLife { amount: 3 }, Effect::search_library("card")],\
                TargetSpec::None),\
        ],\
        ..Default::default() }\
}' mtg-cards/src/sets/ecl.rs

(empty result)

Now improve Tend the Sprigs:

>cat -n mtg-cards/src/sets/ecl.rs | sed -n '4400,4412p'

  4400	            Ability::spell(id,
  4401	                vec![Effect::Custom("Search your library for a basic land card, put it onto the battlefield tapped, then shuffle. Then if you control seven or more lands and/or Treefolk, create a 3/4 green Treefolk creature token with re".into())],
  4402	                TargetSpec::None),
  4403	        ],
  4404	        ..Default::default() }
  4405	}
  4406	
  4407	// ENGINE DEPS: [CHOICE] Draw 3, then discard 2 unless you discard a creature card
  4408	fn thirst_for_identity(id: ObjectId, owner: PlayerId) -> CardData {
  4409	    CardData { id, owner, name: "Thirst for Identity".into(), mana_cost: ManaCost::parse("{2}{U}"),
  4410	        card_types: vec![CardType::Instant],
  4411	        rarity: Rarity::Common,
  4412	        abilities: vec![

>cat -n mtg-cards/src/sets/ecl.rs | sed -n '4396,4405p'

  4396	    CardData { id, owner, name: "Tend the Sprigs".into(), mana_cost: ManaCost::parse("{2}{G}"),
  4397	        card_types: vec![CardType::Sorcery],
  4398	        rarity: Rarity::Common,
  4399	        abilities: vec![
  4400	            Ability::spell(id,
  4401	                vec![Effect::Custom("Search your library for a basic land card, put it onto the battlefield tapped, then shuffle. Then if you control seven or more lands and/or Treefolk, create a 3/4 green Treefolk creature token with re".into())],
  4402	                TargetSpec::None),
  4403	        ],
  4404	        ..Default::default() }
  4405	}

sed -i '4395,4405c\
// ENGINE DEPS: [COND] Search basic land + conditional Treefolk token\
fn tend_the_sprigs(id: ObjectId, owner: PlayerId) -> CardData {\
    // Sorcery {2}{G}. Search basic land to BF tapped. If 7+ lands/Treefolk, create 3/4 Treefolk with reach.\
    CardData { id, owner, name: "Tend the Sprigs".into(), mana_cost: ManaCost::parse("{2}{G}"),\
        card_types: vec![CardType::Sorcery],\
        rarity: Rarity::Common,\
        abilities: vec![\
            Ability::spell(id,\
                vec![Effect::search_library("basic land"), Effect::Custom("If 7+ lands/Treefolk, create 3/4 Treefolk with reach.".into())],\
                TargetSpec::None),\
        ],\
        ..Default::default() }\
}' mtg-cards/src/sets/ecl.rs

(empty result)

Now improve Sapling Nursery:

>cat -n mtg-cards/src/sets/ecl.rs | sed -n '3341,3357p'

  3341	        power: Some(2), toughness: Some(4),
  3342	        rarity: Rarity::Rare,
  3343	        ..Default::default() }
  3344	}
  3345	
  3346	// ENGINE DEPS: [COND] Affinity for Forests, landfall then Treefolk token, exile self then indestructible until EOT
  3347	fn sapling_nursery(id: ObjectId, owner: PlayerId) -> CardData {
  3348	    CardData { id, owner, name: "Sapling Nursery".into(),
  3349	        mana_cost: ManaCost::parse("{6}{G}{G}"),
  3350	        card_types: vec![CardType::Enchantment],
  3351	        rarity: Rarity::Rare,
  3352	        keywords: KeywordAbilities::INDESTRUCTIBLE,
  3353	        abilities: vec![
  3354	            Ability::activated(id,
  3355	                    "Activated ability.",
  3356	                    vec![Cost::pay_mana("{1}{G}")],
  3357	                    vec![Effect::Custom("Activated effect.".into())],

>cat -n mtg-cards/src/sets/ecl.rs | sed -n '3346,3362p'

  3346	// ENGINE DEPS: [COND] Affinity for Forests, landfall then Treefolk token, exile self then indestructible until EOT
  3347	fn sapling_nursery(id: ObjectId, owner: PlayerId) -> CardData {
  3348	    CardData { id, owner, name: "Sapling Nursery".into(),
  3349	        mana_cost: ManaCost::parse("{6}{G}{G}"),
  3350	        card_types: vec![CardType::Enchantment],
  3351	        rarity: Rarity::Rare,
  3352	        keywords: KeywordAbilities::INDESTRUCTIBLE,
  3353	        abilities: vec![
  3354	            Ability::activated(id,
  3355	                    "Activated ability.",
  3356	                    vec![Cost::pay_mana("{1}{G}")],
  3357	                    vec![Effect::Custom("Activated effect.".into())],
  3358	                    TargetSpec::None),
  3359	        ],
  3360	        ..Default::default() }
  3361	}
  3362

sed -i '3346,3361c\
// ENGINE DEPS: [COND] Affinity for Forests, landfall then Treefolk token, exile self then indestructible until EOT\
fn sapling_nursery(id: ObjectId, owner: PlayerId) -> CardData {\
    // Enchantment {6}{G}{G}. Affinity for Forests. Landfall: Treefolk token. Exile: indestructible until EOT.\
    CardData { id, owner, name: "Sapling Nursery".into(),\
        mana_cost: ManaCost::parse("{6}{G}{G}"),\
        card_types: vec![CardType::Enchantment],\
        rarity: Rarity::Rare,\
        abilities: vec![\
            Ability::static_ability(id,\
                "Affinity for Forests.",\
                vec![StaticEffect::CostReduction { filter: "Forest".into(), amount: 1 }]),\
            Ability::triggered(id,\
                "Landfall — Whenever a land you control enters, create a 3/4 green Treefolk creature token with reach.",\
                vec![EventType::EnteredTheBattlefield],\
                vec![Effect::create_token("3/4 Treefolk with reach", 1)],\
                TargetSpec::None),\
            Ability::activated(id,\
                "{1}{G}, Exile this enchantment: Treefolk and Forests you control gain indestructible until end of turn.",\
                vec![Cost::pay_mana("{1}{G}"), Cost::Custom("Exile this enchantment".into())],\
                vec![Effect::Custom("Treefolk and Forests you control gain indestructible until end of turn.".into())],\
                TargetSpec::None),\
        ],\
        ..Default::default() }\
}' mtg-cards/src/sets/ecl.rs

(empty result)

Now let me improve Kinbinding - I need to check the Java source first:

Here's the full Java source for **Kinbinding.java**:

```java
package mage.cards.k;

import mage.abilities.Ability;
import mage.abilities.common.SimpleStaticAbility;
import mage.abilities.dynamicvalue.DynamicValue;
import mage.abilities.effects.Effect;
import mage.abilities.effects.common.CreateTokenEffect;
import mage.abilities.effects.common.continuous.BoostControlledEffect;
import mage.abilities.hint.Hint;
import mage.abilities.hint.ValueHint;
import mage.abilities.triggers.BeginningOfCombatTriggeredAbility;
import mage.cards.CardImpl;
import mage.cards.CardSetInfo;
import mage.constants.CardType;
import mage.constants.Duration;
import mage.constants.WatcherScope;
import mage.game.Game;
import mage.game.events.GameEvent;
import mage.game.permanent.Permanent;
import mage.game.permanent.token.KithkinGreenWhiteToken;
import mage.util.CardUtil;
import mage.watchers.Watcher;

import java.util.HashMap;
import java.util.Map;
import java.util.UUID;

/**
 * @author TheElk801
 */
public final class Kinbinding extends CardImpl {

    public Kinbinding(UUID ownerId, CardSetInfo setInfo) {
        super(ownerId, setInfo, new CardType[]{CardType.ENCHANTMENT}, "{3}{W}{W}");

        // Creatures you control get +X/+X, where X is the number of creatures that entered the battlefield under your control this turn.
        this.addAbility(new SimpleStaticAbility(new BoostControlledEffect(
                KinbindingValue.instance, KinbindingValue.instance, Duration.WhileOnBattlefield
        )).addHint(KinbindingValue.getHint()), new KinbindingWatcher());

        // At the beginning of combat on your turn, create a 1/1 green and white Kithkin creature token.
        this.addAbility(new BeginningOfCombatTriggeredAbility(new CreateTokenEffect(new KithkinGreenWhiteToken())));
    }

    private Kinbinding(final Kinbinding card) {
        super(card);
    }

    @Override
    public Kinbinding copy() {
        return new Kinbinding(this);
    }
}

enum KinbindingValue implements DynamicValue {
    instance;
    private static final Hint hint = new ValueHint("Creatures that entered under your control this turn", instance);

    public static Hint getHint() {
        return hint;
    }

    @Override
    public int calculate(Game game, Ability sourceAbility, Effect effect) {
        return KinbindingWatcher.getCount(game, sourceAbility);
    }

    @Override
    public KinbindingValue copy() {
        return this;
    }

    @Override
    public String getMessage() {
        return "the number of creatures that entered the battlefield under your control this turn";
    }

    @Override
    public String toString() {
        return "X";
    }
}

class KinbindingWatcher extends Watcher {

    private final Map<UUID, Integer> map = new HashMap<>();

    KinbindingWatcher() {
        super(WatcherScope.GAME);
    }

    @Override
    public void watch(GameEvent event, Game game) {
        if (event.getType() != GameEvent.EventType.ENTERS_THE_BATTLEFIELD) {
            return;
        }
        Permanent permanent = game.getPermanent(event.getTargetId());
        if (permanent != null && permanent.isCreature(game)) {
            map.compute(permanent.getControllerId(), CardUtil::setOrIncrementValue);
        }
    }

    @Override
    public void reset() {
        super.reset();
        map.clear();
    }

    static int getCount(Game game, Ability source) {
        return game
                .getState()
                .getWatcher(KinbindingWatcher.class)
                .map
                .getOrDefault(source.getControllerId(), 0);
    }
}
```

**File location:** `/mnt/dest-btrfs/home/jc/src/mage/Mage.Sets/src/mage/cards/k/Kinbinding.java`

This is a white enchantment card that:
1. Boosts all controlled creatures by +X/+X where X is the number of creatures that entered the battlefield under your control this turn
2. Creates a 1/1 green and white Kithkin token at the beginning of combat each turn
3. Uses a custom `DynamicValue` enum and `Watcher` to track creature entries throughout the turn
agentId: a620ae8 (for resuming to continue this agent's work if needed)
<usage>total_tokens: 22381
tool_uses: 2
duration_ms: 9266</usage>

Compiles clean. Now let me commit the changes.

>cat -n mtg-cards/src/sets/ecl.rs | sed -n '2902,2913p'

  2902	fn kinbinding(id: ObjectId, owner: PlayerId) -> CardData {
  2903	    CardData { id, owner, name: "Kinbinding".into(),
  2904	        mana_cost: ManaCost::parse("{3}{W}{W}"),
  2905	        card_types: vec![CardType::Enchantment],
  2906	        rarity: Rarity::Rare,
  2907	        abilities: vec![
  2908	            Ability::static_ability(id,
  2909	                    "Static effect.",
  2910	                    vec![StaticEffect::Custom("Static effect.".into())]),
  2911	        ],
  2912	        ..Default::default() }
  2913	}

sed -i '2901,2913c\
// ENGINE DEPS: [COND] Dynamic +X/+X where X=creatures entered this turn (watcher), begin-of-combat token creation\
fn kinbinding(id: ObjectId, owner: PlayerId) -> CardData {\
    // Enchantment {3}{W}{W}. Creatures +X/+X (X=creatures ETBd this turn). Combat: create 1/1 Kithkin.\
    CardData { id, owner, name: "Kinbinding".into(),\
        mana_cost: ManaCost::parse("{3}{W}{W}"),\
        card_types: vec![CardType::Enchantment],\
        rarity: Rarity::Rare,\
        abilities: vec![\
            Ability::static_ability(id,\
                "Creatures you control get +X/+X, where X is the number of creatures that entered the battlefield under your control this turn.",\
                vec![StaticEffect::Custom("Dynamic +X/+X where X = creatures ETB this turn.".into())]),\
            Ability::triggered(id,\
                "At the beginning of combat on your turn, create a 1/1 green and white Kithkin creature token.",\
                vec![EventType::BeginCombat],\
                vec![Effect::create_token("1/1 Kithkin", 1)],\
                TargetSpec::None),\
        ],\
        ..Default::default() }\
}' mtg-cards/src/sets/ecl.rs

(empty result)

Let me check if EventType::BeginCombat exists:

Good, EventType::BeginCombat exists. Let me check compilation:

>cd /mnt/dest-btrfs/home/jc/src/mage && git status -u

On branch master
Your branch is ahead of 'origin/master' by 10 commits.
  (use "git push" to publish your local commits)

Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git restore <file>..." to discard changes in working directory)
	modified:   mtg-rl/docs/ecl-remediation.md
	modified:   mtg-rl/mtg-cards/src/sets/ecl.rs

Untracked files:
  (use "git add <file>..." to include in what will be committed)
	.claude/ralph-loop.local.md
	mtg-rl/docs/.ecl-dependency-graph.md.swp
	mtg-rl/docs/ecl-dependency-graph.md

no changes added to commit (use "git add" and/or "git commit -a")

Let me also check EventType::DrawStep:

Good. Now let me improve a few more cards, then compile and commit. Let me look at Figure of Fable and Kinscaer Sentry:

Here are the full Java sources for both ECL cards:

## 1. FigureOfFable.java
**Location:** `/mnt/dest-btrfs/home/jc/src/mage/Mage.Sets/src/mage/cards/f/FigureOfFable.java`

```java
package mage.cards.f;

import mage.MageInt;
import mage.abilities.Ability;
import mage.abilities.common.SimpleActivatedAbility;
import mage.abilities.costs.mana.ManaCostsImpl;
import mage.abilities.effects.OneShotEffect;
import mage.abilities.effects.common.continuous.AddCardSubTypeSourceEffect;
import mage.abilities.effects.common.continuous.GainAbilitySourceEffect;
import mage.abilities.effects.common.continuous.SetBasePowerToughnessSourceEffect;
import mage.abilities.keyword.ProtectionFromEachOpponentAbility;
import mage.cards.CardImpl;
import mage.cards.CardSetInfo;
import mage.constants.CardType;
import mage.constants.Duration;
import mage.constants.Outcome;
import mage.constants.SubType;
import mage.game.Game;
import mage.game.permanent.Permanent;

import java.util.UUID;

/**
 * @author TheElk801
 */
public final class FigureOfFable extends CardImpl {

    public FigureOfFable(UUID ownerId, CardSetInfo setInfo) {
        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{G/W}");

        this.subtype.add(SubType.KITHKIN);
        this.power = new MageInt(1);
        this.toughness = new MageInt(1);

        // {G/W}: This creature becomes a Kithkin Scout with base power and toughness 2/3.
        Ability ability = new SimpleActivatedAbility(new AddCardSubTypeSourceEffect(
                Duration.Custom, SubType.KITHKIN, SubType.SCOUT
        ).setText("{this} becomes a Kithkin Scout"), new ManaCostsImpl<>("{G/W}"));
        ability.addEffect(new SetBasePowerToughnessSourceEffect(
                2, 3, Duration.Custom
        ).setText("with base power and toughness 2/3"));
        this.addAbility(ability);

        // {1}{G/W}{G/W}: If this creature is a Scout, it becomes a Kithkin Soldier with base power and toughness 4/5.
        this.addAbility(new SimpleActivatedAbility(new FigureOfFableScoutEffect(), new ManaCostsImpl<>("{1}{G/W}{G/W}")));

        // {3}{G/W}{G/W}{G/W}: If this creature is a Soldier, it becomes a Kithkin Avatar with base power and toughness 7/8 and protection from each of your opponents.
        this.addAbility(new SimpleActivatedAbility(new FigureOfFableSoldierEffect(), new ManaCostsImpl<>("{3}{G/W}{G/W}{G/W}")));
    }

    private FigureOfFable(final FigureOfFable card) {
        super(card);
    }

    @Override
    public FigureOfFable copy() {
        return new FigureOfFable(this);
    }
}

class FigureOfFableScoutEffect extends OneShotEffect {

    FigureOfFableScoutEffect() {
        super(Outcome.Benefit);
        staticText = "if {this} is a Scout, it becomes a Kithkin Soldier with base power and toughness 4/5";
    }

    private FigureOfFableScoutEffect(final FigureOfFableScoutEffect effect) {
        super(effect);
    }

    @Override
    public FigureOfFableScoutEffect copy() {
        return new FigureOfFableScoutEffect(this);
    }

    @Override
    public boolean apply(Game game, Ability source) {
        Permanent permanent = source.getSourcePermanentIfItStillExists(game);
        if (permanent == null || !permanent.hasSubtype(SubType.SCOUT, game)) {
            return false;
        }
        game.addEffect(new AddCardSubTypeSourceEffect(
                Duration.Custom, SubType.KITHKIN, SubType.SOLDIER
        ), source);
        game.addEffect(new SetBasePowerToughnessSourceEffect(
                4, 5, Duration.Custom
        ), source);
        return true;
    }
}

class FigureOfFableSoldierEffect extends OneShotEffect {

    FigureOfFableSoldierEffect() {
        super(Outcome.Benefit);
        staticText = "if {this} is a Soldier, it becomes a Kithkin Avatar " +
                "with base power and toughness 7/8 and protection from each of your opponents";
    }

    private FigureOfFableSoldierEffect(final FigureOfFableSoldierEffect effect) {
        super(effect);
    }

    @Override
    public FigureOfFableSoldierEffect copy() {
        return new FigureOfFableSoldierEffect(this);
    }

    @Override
    public boolean apply(Game game, Ability source) {
        Permanent permanent = source.getSourcePermanentIfItStillExists(game);
        if (permanent == null || !permanent.hasSubtype(SubType.SOLDIER, game)) {
            return false;
        }
        game.addEffect(new AddCardSubTypeSourceEffect(
                Duration.Custom, SubType.KITHKIN, SubType.AVATAR
        ), source);
        game.addEffect(new SetBasePowerToughnessSourceEffect(
                7, 8, Duration.Custom
        ), source);
        game.addEffect(new GainAbilitySourceEffect(
                new ProtectionFromEachOpponentAbility(), Duration.Custom
        ), source);
        return true;
    }
}
```

## 2. KinscaerSentry.java
**Location:** `/mnt/dest-btrfs/home/jc/src/mage/Mage.Sets/src/mage/cards/k/KinscaerSentry.java`

```java
package mage.cards.k;

import mage.MageInt;
import mage.abilities.common.AttacksTriggeredAbility;
import mage.abilities.dynamicvalue.common.PermanentsOnBattlefieldCount;
import mage.abilities.effects.common.PutCardFromHandOntoBattlefieldEffect;
import mage.abilities.hint.Hint;
import mage.abilities.hint.ValueHint;
import mage.abilities.keyword.FirstStrikeAbility;
import mage.abilities.keyword.LifelinkAbility;
import mage.cards.Card;
import mage.cards.CardImpl;
import mage.cards.CardSetInfo;
import mage.constants.CardType;
import mage.constants.SubType;
import mage.filter.FilterCard;
import mage.filter.FilterPermanent;
import mage.filter.common.FilterControlledCreaturePermanent;
import mage.filter.predicate.ObjectSourcePlayer;
import mage.filter.predicate.ObjectSourcePlayerPredicate;
import mage.filter.predicate.permanent.AttackingPredicate;
import mage.game.Game;

import java.util.UUID;

/**
 * @author TheElk801
 */
public final class KinscaerSentry extends CardImpl {

    private static final FilterCard filter = new FilterCard(
            "creature card with mana value less than or equal to the number of attacking creatures you control"
    );

    static {
        filter.add(KinscaerSentryPredicate.instance);
    }

    public KinscaerSentry(UUID ownerId, CardSetInfo setInfo) {
        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{1}{W}");

        this.subtype.add(SubType.KITHKIN);
        this.subtype.add(SubType.SOLDIER);
        this.power = new MageInt(2);
        this.toughness = new MageInt(2);

        // First strike
        this.addAbility(FirstStrikeAbility.getInstance());

        // Lifelink
        this.addAbility(LifelinkAbility.getInstance());

        // Whenever this creature attacks, you may put a creature card with mana value X or less from your hand onto the battlefield tapped and attacking, where X is the number of attacking creatures you control.
        this.addAbility(new AttacksTriggeredAbility(new PutCardFromHandOntoBattlefieldEffect(
                filter, false, true, true
        ).setText("you may put a creature card with mana value X or less from your hand onto the battlefield " +
                "tapped and attacking, where X is the number of attacking creatures you control")).addHint(KinscaerSentryPredicate.getHint()));
    }

    private KinscaerSentry(final KinscaerSentry card) {
        super(card);
    }

    @Override
    public KinscaerSentry copy() {
        return new KinscaerSentry(this);
    }
}

enum KinscaerSentryPredicate implements ObjectSourcePlayerPredicate<Card> {
    instance;
    private static final FilterPermanent filter = new FilterControlledCreaturePermanent();

    static {
        filter.add(AttackingPredicate.instance);
    }

    private static final Hint hint = new ValueHint("Attacking creatures you control", new PermanentsOnBattlefieldCount(filter));

    public static Hint getHint() {
        return hint;
    }

    @Override
    public boolean apply(ObjectSourcePlayer<Card> input, Game game) {
        return input.getObject().getManaValue() <= game.getBattlefield().count(filter, input.getPlayerId(), input.getSource(), game);
    }
}
```
agentId: a749264 (for resuming to continue this agent's work if needed)
<usage>total_tokens: 25731
tool_uses: 4
duration_ms: 17754</usage>

These are both complex cards:

Figure of Fable - 3 level-up style activated abilities that change type and base P/T. The first two abilities could be partially typed but the conditional check (if Scout/if Soldier) can't be checked. Can improve with better descriptions.
Kinscaer Sentry - Attack trigger puts creature from hand onto BF tapped+attacking if MV <= attacking creature count. Very complex, needs put-from-hand-to-BF mechanic.

Let me improve Figure of Fable's description and typing.

Let me also do a few more quick improvements on other cards, then compile and commit this batch.

I should focus on the cards I haven't refined yet—Figure of Fable and Kinscaer Sentry both need clearer descriptions and more workable effects.

>cat -n mtg-cards/src/sets/ecl.rs | sed -n '2590,2608p'

  2590	fn figure_of_fable(id: ObjectId, owner: PlayerId) -> CardData {
  2591	    CardData { id, owner, name: "Figure of Fable".into(),
  2592	        mana_cost: ManaCost::parse("{G/W}"),
  2593	        card_types: vec![CardType::Creature],
  2594	        subtypes: vec![SubType::Custom("Kithkin".into())],
  2595	        power: Some(1), toughness: Some(1),
  2596	        rarity: Rarity::Rare,
  2597	        abilities: vec![
  2598	            Ability::activated(id,
  2599	                    "Activated ability.",
  2600	                    vec![Cost::pay_mana("{G/W}")],
  2601	                    vec![Effect::Custom("Activated effect.".into())],
  2602	                    TargetSpec::None),
  2603	        ],
  2604	        ..Default::default() }
  2605	}
  2606	
  2607	// ENGINE DEPS: [COND+MANA] Changeling, any-color mana, animated artifact (becomes 4/4 creature until EOT)
  2608	fn firdoch_core(id: ObjectId, owner: PlayerId) -> CardData {

sed -i '2589,2605c\
// ENGINE DEPS: [COND] Multi-level activated abilities changing type/base P/T\
fn figure_of_fable(id: ObjectId, owner: PlayerId) -> CardData {\
    // 1/1 Kithkin {G/W}. 3 level-up activated abilities: 2/3 Scout, 4/5 Soldier, 7/8 Avatar with protection.\
    CardData { id, owner, name: "Figure of Fable".into(),\
        mana_cost: ManaCost::parse("{G/W}"),\
        card_types: vec![CardType::Creature],\
        subtypes: vec![SubType::Custom("Kithkin".into())],\
        power: Some(1), toughness: Some(1),\
        rarity: Rarity::Rare,\
        abilities: vec![\
            Ability::activated(id,\
                "{G/W}: This creature becomes a Kithkin Scout with base power and toughness 2/3.",\
                vec![Cost::pay_mana("{G/W}")],\
                vec![Effect::SetPowerToughness { power: 2, toughness: 3 }],\
                TargetSpec::None),\
            Ability::activated(id,\
                "{1}{G/W}{G/W}: If this creature is a Scout, it becomes a Kithkin Soldier with base power and toughness 4/5.",\
                vec![Cost::pay_mana("{1}{G/W}{G/W}")],\
                vec![Effect::Custom("If Scout: becomes Kithkin Soldier 4/5.".into())],\
                TargetSpec::None),\
            Ability::activated(id,\
                "{3}{G/W}{G/W}{G/W}: If this creature is a Soldier, it becomes a Kithkin Avatar 7/8 with protection from each opponent.",\
                vec![Cost::pay_mana("{3}{G/W}{G/W}{G/W}")],\
                vec![Effect::Custom("If Soldier: becomes Kithkin Avatar 7/8 with protection.".into())],\
                TargetSpec::None),\
        ],\
        ..Default::default() }\
}' mtg-cards/src/sets/ecl.rs

(empty result)

Now improve Kinscaer Sentry:

>cat -n mtg-cards/src/sets/ecl.rs | sed -n '2928,2945p'

  2928	        ],
  2929	        ..Default::default() }
  2930	}
  2931	
  2932	// ENGINE DEPS: [COND] Attacks then put creature from hand onto battlefield tapped+attacking if MV <= attacking count
  2933	fn kinscaer_sentry(id: ObjectId, owner: PlayerId) -> CardData {
  2934	    CardData { id, owner, name: "Kinscaer Sentry".into(),
  2935	        mana_cost: ManaCost::parse("{1}{W}"),
  2936	        card_types: vec![CardType::Creature],
  2937	        subtypes: vec![SubType::Custom("Kithkin".into()), SubType::Soldier],
  2938	        power: Some(2), toughness: Some(2),
  2939	        rarity: Rarity::Rare,
  2940	        keywords: KeywordAbilities::FIRST_STRIKE | KeywordAbilities::LIFELINK,
  2941	        abilities: vec![
  2942	            Ability::triggered(id,
  2943	                    "Whenever this attacks, trigger effect.",
  2944	                    vec![EventType::AttackerDeclared],
  2945	                    vec![Effect::Custom("Attack trigger.".into())],

sed -i '2932,2949c\
// ENGINE DEPS: [COND] Attacks then put creature from hand onto battlefield tapped+attacking if MV <= attacking count\
fn kinscaer_sentry(id: ObjectId, owner: PlayerId) -> CardData {\
    // 2/2 Kithkin Soldier {1}{W}. First strike, lifelink. Attacks: put creature MV<=attackers from hand tapped+attacking.\
    CardData { id, owner, name: "Kinscaer Sentry".into(),\
        mana_cost: ManaCost::parse("{1}{W}"),\
        card_types: vec![CardType::Creature],\
        subtypes: vec![SubType::Custom("Kithkin".into()), SubType::Soldier],\
        power: Some(2), toughness: Some(2),\
        rarity: Rarity::Rare,\
        keywords: KeywordAbilities::FIRST_STRIKE | KeywordAbilities::LIFELINK,\
        abilities: vec![\
            Ability::attacks_triggered(id,\
                "Whenever this creature attacks, you may put a creature card with mana value X or less from your hand onto the battlefield tapped and attacking, where X is the number of attacking creatures you control.",\
                vec![Effect::Custom("Put creature MV<=attacking count from hand onto BF tapped+attacking.".into())],\
                TargetSpec::None),\
        ],\
        ..Default::default() }\
}' mtg-cards/src/sets/ecl.rs

(empty result)

Let me compile and run tests:

All passing. Let me commit this batch:

git add mtg-cards/src/sets/ecl.rs docs/ecl-todo.md && git commit -m "$(cat <<'EOF'
Improve 8 more ECL cards with typed effects and better descriptions

- Mornsong Aria: type statics (CantGainLife + CantDrawExtraCards) + triggered
  lose_life(3) + search_library
- Tend the Sprigs: type with search_library("basic land") + Custom conditional
- Sapling Nursery: add CostReduction static, landfall token trigger, exile activated
- Kinbinding: add begin-of-combat Kithkin token trigger, better static description
- Figure of Fable: add 3 level-up activated abilities with proper costs
- Kinscaer Sentry: use attacks_triggered with better description
- Foraging Wickermaw: type ETB scry(1) + add mana ability
- Retched Wretch: type dies trigger with reanimate()

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
EOF
)"

[master ddb8e5e74f] Improve 8 more ECL cards with typed effects and better descriptions
 1 file changed, 54 insertions(+), 21 deletions(-)

Let me verify the ecl-todo.md changes were included:

The diff is empty, meaning ecl-todo.md was included. Good. Now let me continue with more work. Let me focus on implementing another engine feature or improving more cards. Let me look at what unchecked categories have simple engine needs.

Let me now work on improving more stub cards across all the remaining categories. I'll scan for cards with placeholder implementations ("trigger effect.", "Activated effect.", etc.) and improve them based on Java sources.

>grep -n '"Activated effect."' mtg-cards/src/sets/ecl.rs

2651:                    vec![Effect::Custom("Activated effect.".into())],
2990:                    vec![Effect::Custom("Activated effect.".into())],
3345:                    vec![Effect::Custom("Activated effect.".into())],
3469:                    vec![Effect::Custom("Activated effect.".into())],
3585:                    vec![Effect::Custom("Activated effect.".into())],

>grep -n '"ETB effect."' mtg-cards/src/sets/ecl.rs

2687:                    vec![Effect::Custom("ETB effect.".into())],
2719:                    vec![Effect::Custom("ETB effect.".into())],
2985:                    vec![Effect::Custom("ETB effect.".into())],
3034:                    vec![Effect::Custom("ETB effect.".into())],
3197:                    vec![Effect::Custom("ETB effect.".into())],
3215:                    vec![Effect::Custom("ETB effect.".into())],
3233:                    vec![Effect::Custom("ETB effect.".into())],
3329:                    vec![Effect::Custom("ETB effect.".into())],
3400:                    vec![Effect::Custom("ETB effect.".into())],
3499:                    vec![Effect::Custom("ETB effect.".into())],
3536:                    vec![Effect::Custom("ETB effect.".into())],
3602:                    vec![Effect::Custom("ETB effect.".into())],
3659:                    vec![Effect::Custom("ETB effect.".into())],
3719:                    vec![Effect::Custom("ETB effect.".into())],
3800:                    vec![Effect::Custom("ETB effect.".into())],

15 placeholder ETB effects. Let me batch-improve these. Let me find which cards these are:

Let me also check for other placeholder patterns:

38 placeholder static effects and some attack triggers. Let me focus on improving the cards with placeholder ETB effects since those are most valuable to type. Let me batch-read the Java sources for all 15 ETB placeholder cards:

Perfect! I've found all 15 ECL cards. Here's a comprehensive analysis of their ETB (enters the battlefield) effects:

## ECL Card ETB Effects Analysis

| # | Card | ETB Effect | Typeable Effects |
|---|------|-----------|------------------|
| 1 | **Gathering Stone** | When enters and at beginning of upkeep, look at top library card. If it matches the chosen creature type, may reveal it and put into hand, otherwise may put into graveyard. | `search_library` (partial - library scry effect) |
| 2 | **Gilt Leaf's Embrace** | Enchanted creature gains trample and indestructible until end of turn. | `gain_keyword_eot` (trample, indestructible) |
| 3 | **Lluwen Imperfect Naturalist** | Mill four cards, then optionally put a creature or land from milled cards on top of library. | `mill`, `search_library` (partial) |
| 4 | **Lofty Dreams** | Draw a card. | `draw_cards` |
| 5 | **Pitiless Fists** | Enchanted creature fights up to one target opponent creature. | Not directly typeable (fight effect) |
| 6 | **Prismatic Undercurrents** | Search library for up to X basic lands (X = colors among your permanents), reveal, put in hand, shuffle. | `search_library` |
| 7 | **Puca's Eye** | Draw a card, then choose a color. The artifact becomes that color. | `draw_cards` (partial - color assignment is custom) |
| 8 | **Rhys the Evermore** | Another target creature you control gains persist until end of turn. | `gain_keyword_eot` (persist) |
| 9 | **Selfless Safewright** | Choose a creature type. Other permanents you control of that type gain hexproof and indestructible until EOT. | `gain_keyword_eot` (hexproof, indestructible on filtered targets) |
| 10 | **Stalactite Dagger** | Create a 1/1 colorless Shapeshifter token with changeling. | `create_token` |
| 11 | **Sunderflock** | If you cast it, return all non-Elemental creatures to owners' hands. | `bounce` (partial - conditional, creature-type filtered) |
| 12 | **Taster of Wares** | Target opponent reveals X cards from hand (X = Goblins you control). You choose one to exile. If instant/sorcery, you may cast it while you control Taster. | Not directly typeable (custom ability - exile for casting) |
| 13 | **Twilight Diviner** | Surveil 2. | `scry` (surveil is similar) |
| 14 | **Vibrance** | If {R}{R} spent: deal 3 damage to target. If {G}{G} spent: search library for land, reveal, put in hand, shuffle, gain 2 life. | `damage` (conditional), `search_library` (conditional), `gain_life` (conditional) |
| 15 | **Wistfulness** | If {G}{G} spent: exile target artifact/enchantment opponent controls. If {U}{U} spent: draw 2 cards, discard 1. | `exile`, `draw_cards` (both conditional) |

## Summary

**Fully typeable with existing effects:**
- Lofty Dreams, Stalactite Dagger, Prismatic Undercurrents (search_library, create_token)
- Gilt Leaf's Embrace, Rhys the Evermore, Selfless Safewright (gain_keyword_eot)
- Twilight Diviner (scry/surveil)

**Mostly typeable:**
- Lluwen Imperfect Naturalist (mill + partial search)
- Vibrance & Wistfulness (damage, draw, exile, gain_life with conditions)
- Puca's Eye (draw_cards, custom color assignment)

**Partially typeable or custom:**
- Gathering Stone (library inspection mechanic - custom)
- Pitiless Fists (fight mechanic - likely needs custom)
- Taster of Wares (exile-for-casting mechanic - definitely custom)
- Sunderflock (conditional bounce with type filtering)
agentId: a83e1a3 (for resuming to continue this agent's work if needed)
<usage>total_tokens: 42478
tool_uses: 16
duration_ms: 20296</usage>

Great analysis! Let me now batch-improve the most typeable ones:

Lofty Dreams - ETB: draw a card → draw_cards(1) (it's an Aura though)
Stalactite Dagger - ETB: create 1/1 Shapeshifter with changeling → create_token("1/1 Shapeshifter with changeling", 1)
Twilight Diviner - ETB: surveil 2 → scry(2) (approximation)
Puca's Eye - ETB: draw a card + choose color → draw_cards(1) + Custom
Lluwen - Mill 4 + put creature/land on top → mill(4) + Custom
Rhys - ETB: grant persist → Custom (persist keyword not in our system)
Selfless Safewright - ETB: choose type, grant hexproof+indestructible → Complex but could type partially

Now I'm tackling the five placeholder activated effects to streamline those as well.

Excellent analysis. Let me batch-improve the most typeable placeholder cards. I'll focus on the ones with clear typed effects.

>grep -n 'fn lofty_dreams\|fn stalactite_dagger\|fn twilight_diviner\|fn pucas_eye\|fn lluwen' mtg-cards/src/sets/ecl.rs

2974:fn lluwen_imperfect_naturalist(id: ObjectId, owner: PlayerId) -> CardData {
3024:fn lofty_dreams(id: ObjectId, owner: PlayerId) -> CardData {
3225:fn pucas_eye(id: ObjectId, owner: PlayerId) -> CardData {
3490:fn stalactite_dagger(id: ObjectId, owner: PlayerId) -> CardData {
3649:fn twilight_diviner(id: ObjectId, owner: PlayerId) -> CardData {

>cat -n mtg-cards/src/sets/ecl.rs | sed -n '3024,3045p'

  3024	fn lofty_dreams(id: ObjectId, owner: PlayerId) -> CardData {
  3025	    CardData { id, owner, name: "Lofty Dreams".into(),
  3026	        mana_cost: ManaCost::parse("{3}{U}{U}"),
  3027	        card_types: vec![CardType::Enchantment],
  3028	        subtypes: vec![SubType::Aura],
  3029	        rarity: Rarity::Uncommon,
  3030	        keywords: KeywordAbilities::FLYING,
  3031	        abilities: vec![
  3032	            Ability::enters_battlefield_triggered(id,
  3033	                    "When this enters, trigger effect.",
  3034	                    vec![Effect::Custom("ETB effect.".into())],
  3035	                    TargetSpec::Creature),
  3036	            Ability::static_ability(id,
  3037	                    "Static effect.",
  3038	                    vec![StaticEffect::Custom("Static effect.".into())]),
  3039	        ],
  3040	        ..Default::default() }
  3041	}
  3042	
  3043	// ENGINE DEPS: [EXILE_CAST+COND] ETB this/Elf/Faerie exile opponent top 2, cast from exile with MV restriction, once per turn
  3044	fn maralen_fae_ascendant(id: ObjectId, owner: PlayerId) -> CardData {
  3045	    CardData { id, owner, name: "Maralen, Fae Ascendant".into(),

Perfect! Here are the five ECL card Java source files:

## 1. LoftyDreams.java
```java
package mage.cards.l;

import mage.abilities.Ability;
import mage.abilities.common.EntersBattlefieldTriggeredAbility;
import mage.abilities.common.SimpleStaticAbility;
import mage.abilities.effects.common.AttachEffect;
import mage.abilities.effects.common.DrawCardSourceControllerEffect;
import mage.abilities.effects.common.continuous.BoostEnchantedEffect;
import mage.abilities.effects.common.continuous.GainAbilityAttachedEffect;
import mage.abilities.keyword.ConvokeAbility;
import mage.abilities.keyword.EnchantAbility;
import mage.abilities.keyword.FlyingAbility;
import mage.cards.CardImpl;
import mage.cards.CardSetInfo;
import mage.constants.AttachmentType;
import mage.constants.CardType;
import mage.constants.Outcome;
import mage.constants.SubType;
import mage.target.TargetPermanent;
import mage.target.common.TargetCreaturePermanent;

import java.util.UUID;

/**
 * @author TheElk801
 */
public final class LoftyDreams extends CardImpl {

    public LoftyDreams(UUID ownerId, CardSetInfo setInfo) {
        super(ownerId, setInfo, new CardType[]{CardType.ENCHANTMENT}, "{3}{U}{U}");

        this.subtype.add(SubType.AURA);

        // Convoke
        this.addAbility(new ConvokeAbility());

        // Enchant creature
        TargetPermanent auraTarget = new TargetCreaturePermanent();
        this.getSpellAbility().addTarget(auraTarget);
        this.getSpellAbility().addEffect(new AttachEffect(Outcome.BoostCreature));
        this.addAbility(new EnchantAbility(auraTarget));

        // When this Aura enters, draw a card.
        this.addAbility(new EntersBattlefieldTriggeredAbility(new DrawCardSourceControllerEffect(1)));

        // Enchanted creature gets +2/+2 and has flying.
        Ability ability = new SimpleStaticAbility(new BoostEnchantedEffect(2, 2));
        ability.addEffect(new GainAbilityAttachedEffect(
                FlyingAbility.getInstance(), AttachmentType.AURA
        ).setText("and has flying"));
        this.addAbility(ability);
    }

    private LoftyDreams(final LoftyDreams card) {
        super(card);
    }

    @Override
    public LoftyDreams copy() {
        return new LoftyDreams(this);
    }
}
```

## 2. StalactiteDagger.java
```java
package mage.cards.s;

import mage.abilities.Ability;
import mage.abilities.common.EntersBattlefieldTriggeredAbility;
import mage.abilities.common.SimpleStaticAbility;
import mage.abilities.effects.common.CreateTokenEffect;
import mage.abilities.effects.common.continuous.BoostEquippedEffect;
import mage.abilities.effects.common.continuous.GainAllCreatureTypesAttachedEffect;
import mage.abilities.keyword.EquipAbility;
import mage.cards.CardImpl;
import mage.cards.CardSetInfo;
import mage.constants.CardType;
import mage.constants.SubType;
import mage.game.permanent.token.ShapeshifterColorlessToken;

import java.util.UUID;

/**
 * @author TheElk801
 */
public final class StalactiteDagger extends CardImpl {

    public StalactiteDagger(UUID ownerId, CardSetInfo setInfo) {
        super(ownerId, setInfo, new CardType[]{CardType.ARTIFACT}, "{2}");

        this.subtype.add(SubType.EQUIPMENT);

        // When this Equipment enters, create a 1/1 colorless Shapeshifter creature token with changeling.
        this.addAbility(new EntersBattlefieldTriggeredAbility(new CreateTokenEffect(new ShapeshifterColorlessToken())));

        // Equipped creature gets +1/+1 and is all creature types.
        Ability ability = new SimpleStaticAbility(new BoostEquippedEffect(1, 1));
        ability.addEffect(new GainAllCreatureTypesAttachedEffect().setText("and is all creature types"));
        this.addAbility(ability);

        // Equip {2}
        this.addAbility(new EquipAbility(2));
    }

    private StalactiteDagger(final StalactiteDagger card) {
        super(card);
    }

    @Override
    public StalactiteDagger copy() {
        return new StalactiteDagger(this);
    }
}
```

## 3. TwilightDiviner.java
```java
package mage.cards.t;

import mage.MageInt;
import mage.MageItem;
import mage.abilities.Ability;
import mage.abilities.BatchTriggeredAbility;
import mage.abilities.TriggeredAbilityImpl;
import mage.abilities.common.EntersBattlefieldTriggeredAbility;
import mage.abilities.effects.OneShotEffect;
import mage.abilities.effects.common.CreateTokenCopyTargetEffect;
import mage.abilities.effects.keyword.SurveilEffect;
import mage.cards.CardImpl;
import mage.cards.CardSetInfo;
import mage.constants.CardType;
import mage.constants.Outcome;
import mage.constants.SubType;
import mage.constants.Zone;
import mage.filter.FilterPermanent;
import mage.filter.StaticFilters;
import mage.filter.predicate.Predicates;
import mage.filter.predicate.permanent.PermanentIdPredicate;
import mage.game.Game;
import mage.game.events.GameEvent;
import mage.game.events.ZoneChangeBatchEvent;
import mage.game.events.ZoneChangeEvent;
import mage.game.permanent.Permanent;
import mage.game.stack.Spell;
import mage.players.Player;
import mage.target.TargetPermanent;
import mage.target.targetpointer.FixedTargets;
import mage.util.RandomUtil;

import java.util.Objects;
import java.util.Optional;
import java.util.Set;
import java.util.UUID;
import java.util.stream.Collectors;

/**
 * @author TheElk801
 */
public final class TwilightDiviner extends CardImpl {

    public TwilightDiviner(UUID ownerId, CardSetInfo setInfo) {
        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{2}{B}");

        this.subtype.add(SubType.ELF);
        this.subtype.add(SubType.CLERIC);
        this.power = new MageInt(3);
        this.toughness = new MageInt(3);

        // When this creature enters, surveil 2.
        this.addAbility(new EntersBattlefieldTriggeredAbility(new SurveilEffect(2)));

        // Whenever one or more other creatures you control enter, if they entered or were cast from a graveyard, create a token that's a copy of one of them. This ability triggers only once each turn.
        this.addAbility(new TwilightDivinerTriggeredAbility());
    }

    private TwilightDiviner(final TwilightDiviner card) {
        super(card);
    }

    @Override
    public TwilightDiviner copy() {
        return new TwilightDiviner(this);
    }
}

class TwilightDivinerTriggeredAbility extends TriggeredAbilityImpl implements BatchTriggeredAbility<ZoneChangeEvent> {

    TwilightDivinerTriggeredAbility() {
        super(Zone.BATTLEFIELD, new TwilightDivinerEffect());
        setTriggerPhrase("Whenever one or more other creatures you control enter, if they entered or were cast from a graveyard, ");
        setTriggersLimitEachTurn(1);
    }

    private TwilightDivinerTriggeredAbility(final TwilightDivinerTriggeredAbility ability) {
        super(ability);
    }

    @Override
    public TwilightDivinerTriggeredAbility copy() {
        return new TwilightDivinerTriggeredAbility(this);
    }

    @Override
    public boolean checkEventType(GameEvent event, Game game) {
        return event.getType() == GameEvent.EventType.ZONE_CHANGE_BATCH;
    }

    @Override
    public boolean checkTrigger(GameEvent event, Game game) {
        Set<Permanent> permanents = this
                .getFilteredEvents((ZoneChangeBatchEvent) event, game)
                .stream()
                .map(ZoneChangeEvent::getTarget)
                .collect(Collectors.toSet());
        if (permanents.isEmpty()) {
            return false;
        }
        this.getEffects().setTargetPointer(new FixedTargets(permanents, game));
        return true;
    }

    @Override
    public boolean checkEvent(ZoneChangeEvent event, Game game) {
        if (event.getToZone() != Zone.BATTLEFIELD) {
            return false;
        }
        Permanent permanent = event.getTarget();
        if (permanent == null || !StaticFilters.FILTER_OTHER_CONTROLLED_CREATURE.match(permanent, getControllerId(), this, game)) {
            return false;
        }
        switch (event.getFromZone()) {
            case GRAVEYARD:
                return true;
            case STACK:
                return Optional
                        .ofNullable(permanent)
                        .map(MageItem::getId)
                        .map(game::getSpellOrLKIStack)
                        .map(Spell::getFromZone)
                        .filter(Zone.GRAVEYARD::match)
                        .isPresent();
            default:
                return false;
        }
    }
}

class TwilightDivinerEffect extends OneShotEffect {

    TwilightDivinerEffect() {
        super(Outcome.Benefit);
        staticText = "create a token that's a copy of one of them";
    }

    private TwilightDivinerEffect(final TwilightDivinerEffect effect) {
        super(effect);
    }

    @Override
    public TwilightDivinerEffect copy() {
        return new TwilightDivinerEffect(this);
    }

    @Override
    public boolean apply(Game game, Ability source) {
        Set<Permanent> permanents = getTargetPointer()
                .getTargets(game, source)
                .stream()
                .map(game::getPermanent)
                .filter(Objects::nonNull)
                .collect(Collectors.toSet());
        Permanent permanent;
        switch (permanents.size()) {
            case 0:
                return false;
            case 1:
                permanent = RandomUtil.randomFromCollection(permanents);
                break;
            default:
                Player player = game.getPlayer(source.getControllerId());
                if (player == null) {
                    return false;
                }
                FilterPermanent filter = new FilterPermanent("permanent to copy");
                filter.add(Predicates.or(permanents
                        .stream()
                        .map(MageItem::getId)
                        .map(PermanentIdPredicate::new)
                        .collect(Collectors.toSet())));
                TargetPermanent target = new TargetPermanent(filter);
                player.choose(Outcome.Copy, target, source, game);
                permanent = game.getPermanent(target.getFirstTarget());
        }
        return permanent != null && new CreateTokenCopyTargetEffect().setSavedPermanent(permanent).apply(game, source);
    }
}
```

## 4. LluwenImperfectNaturalist.java
```java
package mage.cards.l;

import mage.MageInt;
import mage.abilities.Ability;
import mage.abilities.common.EntersBattlefieldTriggeredAbility;
import mage.abilities.common.SimpleActivatedAbility;
import mage.abilities.costs.common.DiscardTargetCost;
import mage.abilities.costs.common.TapSourceCost;
import mage.abilities.costs.mana.ManaCostsImpl;
import mage.abilities.dynamicvalue.DynamicValue;
import mage.abilities.dynamicvalue.common.CardsInControllerGraveyardCount;
import mage.abilities.effects.OneShotEffect;
import mage.abilities.effects.common.CreateTokenEffect;
import mage.abilities.hint.Hint;
import mage.abilities.hint.ValueHint;
import mage.cards.Card;
import mage.cards.CardImpl;
import mage.cards.CardSetInfo;
import mage.cards.Cards;
import mage.constants.*;
import mage.filter.StaticFilters;
import mage.game.Game;
import mage.game.permanent.token.BlackGreenWormToken;
import mage.players.Player;
import mage.target.TargetCard;
import mage.target.common.TargetCardInHand;

import java.util.UUID;

/**
 * @author TheElk801
 */
public final class LluwenImperfectNaturalist extends CardImpl {

    private static final DynamicValue xValue = new CardsInControllerGraveyardCount(StaticFilters.FILTER_CARD_LAND);
    private static final Hint hint = new ValueHint("Land cards in your graveyard", xValue);

    public LluwenImperfectNaturalist(UUID ownerId, CardSetInfo setInfo) {
        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{B/G}{B/G}");

        this.supertype.add(SuperType.LEGENDARY);
        this.subtype.add(SubType.ELF);
        this.subtype.add(SubType.DRUID);
        this.power = new MageInt(1);
        this.toughness = new MageInt(3);

        // When Lluwen enters, mill four cards, then you may put a creature or land card from among the milled cards on top of your library.
        this.addAbility(new EntersBattlefieldTriggeredAbility(new LluwenImperfectNaturalistEffect()));

        // {2}{B/G}{B/G}{B/G}, {T}, Discard a land card: Create a 1/1 black and green Worm creature token for each land card in your graveyard.
        Ability ability = new SimpleActivatedAbility(
                new CreateTokenEffect(new BlackGreenWormToken(), xValue), new ManaCostsImpl<>("{2}{B/G}{B/G}{B/G}")
        );
        ability.addCost(new TapSourceCost());
        ability.addCost(new DiscardTargetCost(new TargetCardInHand(StaticFilters.FILTER_CARD_LAND)));
        this.addAbility(ability.addHint(hint));
    }

    private LluwenImperfectNaturalist(final LluwenImperfectNaturalist card) {
        super(card);
    }

    @Override
    public LluwenImperfectNaturalist copy() {
        return new LluwenImperfectNaturalist(this);
    }
}

class LluwenImperfectNaturalistEffect extends OneShotEffect {

    LluwenImperfectNaturalistEffect() {
        super(Outcome.Benefit);
        staticText = "mill four cards, then you may put a creature or land card " +
                "from among the milled cards on top of your library";
    }

    private LluwenImperfectNaturalistEffect(final LluwenImperfectNaturalistEffect effect) {
        super(effect);
    }

    @Override
    public LluwenImperfectNaturalistEffect copy() {
        return new LluwenImperfectNaturalistEffect(this);
    }

    @Override
    public boolean apply(Game game, Ability source) {
        Player player = game.getPlayer(source.getControllerId());
        if (player == null) {
            return false;
        }
        Cards cards = player.millCards(4, source, game);
        if (cards.isEmpty()) {
            return false;
        }
        TargetCard target = new TargetCard(
                0, 1, Zone.ALL, StaticFilters.FILTER_CARD_CREATURE_OR_LAND
        );
        player.choose(Outcome.DrawCard, target, source, game);
        Card card = game.getCard(target.getFirstTarget());
        if (card != null) {
            player.putCardsOnTopOfLibrary(card, game, source, false);
        }
        return true;
    }
}
```

## 5. PucasEye.java
```java
package mage.cards.p;

import mage.ObjectColor;
import mage.abilities.Ability;
import mage.abilities.common.ActivateIfConditionActivatedAbility;
import mage.abilities.common.EntersBattlefieldTriggeredAbility;
import mage.abilities.condition.Condition;
import mage.abilities.costs.common.TapSourceCost;
import mage.abilities.costs.mana.GenericManaCost;
import mage.abilities.dynamicvalue.common.ColorsAmongControlledPermanentsCount;
import mage.abilities.effects.OneShotEffect;
import mage.abilities.effects.common.DrawCardSourceControllerEffect;
import mage.abilities.effects.common.continuous.BecomesColorTargetEffect;
import mage.cards.CardImpl;
import mage.cards.CardSetInfo;
import mage.choices.ChoiceColor;
import mage.constants.CardType;
import mage.constants.Duration;
import mage.constants.Outcome;
import mage.game.Game;
import mage.game.permanent.Permanent;
import mage.players.Player;
import mage.target.targetpointer.FixedTarget;
import mage.util.CardUtil;

import java.util.UUID;

/**
 * @author TheElk801
 */
public final class PucasEye extends CardImpl {

    public PucasEye(UUID ownerId, CardSetInfo setInfo) {
        super(ownerId, setInfo, new CardType[]{CardType.ARTIFACT}, "{2}");

        // When this artifact enters, draw a card, then choose a color. This artifact becomes the chosen color.
        Ability ability = new EntersBattlefieldTriggeredAbility(new DrawCardSourceControllerEffect(1));
        ability.addEffect(new PucasEyeConditionEffect());
        this.addAbility(ability);

        // {3}, {T}: Draw a card. Activate only if there are five colors among permanents you control.
        ability = new ActivateIfConditionActivatedAbility(
                new DrawCardSourceControllerEffect(1),
                new GenericManaCost(3), PucasEyeCondition.instance
        );
        ability.addCost(new TapSourceCost());
        this.addAbility(ability.addHint(ColorsAmongControlledPermanentsCount.ALL_PERMANENTS.getHint()));
    }

    private PucasEye(final PucasEye card) {
        super(card);
    }

    @Override
    public PucasEye copy() {
        return new PucasEye(this);
    }
}

enum PucasEyeCondition implements Condition {
    instance;

    @Override
    public boolean apply(Game game, Ability source) {
        return ColorsAmongControlledPermanentsCount.ALL_PERMANENTS.calculate(game, source, null) == 5;
    }

    @Override
    public String toString() {
        return "there are five colors among permanents you control";
    }
}

class PucasEyeConditionEffect extends OneShotEffect {

    PucasEyeConditionEffect() {
        super(Outcome.Benefit);
        staticText = ", then choose a color. {this} becomes the chosen color";
    }

    private PucasEyeConditionEffect(final PucasEyeConditionEffect effect) {
        super(effect);
    }

    @Override
    public PucasEyeConditionEffect copy() {
        return new PucasEyeConditionEffect(this);
    }

    @Override
    public boolean apply(Game game, Ability source) {
        Player player = game.getPlayer(source.getControllerId());
        if (player == null) {
            return false;
        }
        ChoiceColor choice = new ChoiceColor(true);
        player.choose(outcome, choice, game);
        ObjectColor color = choice.getColor();
        if (color == null) {
            return false;
        }
        game.informPlayers(CardUtil.getSourceLogName(game, source) + ": " + player.getLogName() + " chooses " + color.getDescription());
        Permanent permanent = source.getSourcePermanentIfItStillExists(game);
        if (permanent == null) {
            return false;
        }
        game.addEffect(new BecomesColorTargetEffect(color, false, Duration.Custom)
                .setTargetPointer(new FixedTarget(permanent, game)), source);
        return true;
    }
}
```
agentId: aa96b98 (for resuming to continue this agent's work if needed)
<usage>total_tokens: 33227
tool_uses: 6
duration_ms: 36878</usage>

Now let me batch-improve these cards:

>cat -n mtg-cards/src/sets/ecl.rs | sed -n '3024,3041p'

  3024	fn lofty_dreams(id: ObjectId, owner: PlayerId) -> CardData {
  3025	    CardData { id, owner, name: "Lofty Dreams".into(),
  3026	        mana_cost: ManaCost::parse("{3}{U}{U}"),
  3027	        card_types: vec![CardType::Enchantment],
  3028	        subtypes: vec![SubType::Aura],
  3029	        rarity: Rarity::Uncommon,
  3030	        keywords: KeywordAbilities::FLYING,
  3031	        abilities: vec![
  3032	            Ability::enters_battlefield_triggered(id,
  3033	                    "When this enters, trigger effect.",
  3034	                    vec![Effect::Custom("ETB effect.".into())],
  3035	                    TargetSpec::Creature),
  3036	            Ability::static_ability(id,
  3037	                    "Static effect.",
  3038	                    vec![StaticEffect::Custom("Static effect.".into())]),
  3039	        ],
  3040	        ..Default::default() }
  3041	}

sed -i '3023,3041c\
// ENGINE DEPS: [AURA] Convoke, enchant creature, ETB draw, +2/+2 and flying\
fn lofty_dreams(id: ObjectId, owner: PlayerId) -> CardData {\
    // Aura {3}{U}{U}. Convoke. ETB: draw a card. Enchanted creature gets +2/+2 and has flying.\
    CardData { id, owner, name: "Lofty Dreams".into(),\
        mana_cost: ManaCost::parse("{3}{U}{U}"),\
        card_types: vec![CardType::Enchantment],\
        subtypes: vec![SubType::Aura],\
        rarity: Rarity::Uncommon,\
        abilities: vec![\
            Ability::enters_battlefield_triggered(id,\
                "When this Aura enters, draw a card.",\
                vec![Effect::draw_cards(1)],\
                TargetSpec::None),\
            Ability::static_ability(id,\
                "Enchanted creature gets +2/+2 and has flying.",\
                vec![StaticEffect::Boost { filter: "enchanted creature".into(), power: 2, toughness: 2 },\
                     StaticEffect::GrantKeyword { filter: "enchanted creature".into(), keyword: "flying".into() }]),\
        ],\
        ..Default::default() }\
}' mtg-cards/src/sets/ecl.rs

(empty result)

The dependency graph is a new untracked file. Let me commit the two related changes: the updated dependency graph and the annotated ecl.rs.

Now Stalactite Dagger:

>cat -n mtg-cards/src/sets/ecl.rs | sed -n '3492,3510p'

  3492	    CardData { id, owner, name: "Stalactite Dagger".into(),
  3493	        mana_cost: ManaCost::parse("{2}"),
  3494	        card_types: vec![CardType::Artifact],
  3495	        subtypes: vec![SubType::Equipment],
  3496	        rarity: Rarity::Common,
  3497	        abilities: vec![
  3498	            Ability::enters_battlefield_triggered(id,
  3499	                    "When this enters, trigger effect.",
  3500	                    vec![Effect::Custom("ETB effect.".into())],
  3501	                    TargetSpec::None),
  3502	            Ability::static_ability(id,
  3503	                    "Static effect.",
  3504	                    vec![StaticEffect::Custom("Static effect.".into())]),
  3505	        ],
  3506	        ..Default::default() }
  3507	}
  3508	
  3509	fn steam_vents(id: ObjectId, owner: PlayerId) -> CardData {
  3510	    // DONE - Land — Island Mountain. Pay 2 life or enters tapped.

sed -i '3490,3507c\
// ENGINE DEPS: [EQUIP] ETB: Shapeshifter token with changeling. Equip {2}, equipped gets +1/+1 + all types.\
fn stalactite_dagger(id: ObjectId, owner: PlayerId) -> CardData {\
    // Artifact Equipment {2}. ETB: create 1/1 Shapeshifter with changeling. Equip: +1/+1 + all types.\
    CardData { id, owner, name: "Stalactite Dagger".into(),\
        mana_cost: ManaCost::parse("{2}"),\
        card_types: vec![CardType::Artifact],\
        subtypes: vec![SubType::Equipment],\
        rarity: Rarity::Common,\
        abilities: vec![\
            Ability::enters_battlefield_triggered(id,\
                "When this Equipment enters, create a 1/1 colorless Shapeshifter creature token with changeling.",\
                vec![Effect::create_token("1/1 Shapeshifter with changeling", 1)],\
                TargetSpec::None),\
            Ability::static_ability(id,\
                "Equipped creature gets +1/+1 and is all creature types.",\
                vec![StaticEffect::Boost { filter: "equipped creature".into(), power: 1, toughness: 1 }]),\
            Ability::activated(id,\
                "Equip {2}",\
                vec![Cost::pay_mana("{2}")],\
                vec![Effect::Custom("Equip".into())],\
                TargetSpec::CreatureYouControl),\
        ],\
        ..Default::default() }\
}' mtg-cards/src/sets/ecl.rs

(empty result)

Now Twilight Diviner:

This session is being continued from a previous conversation that ran out of context. The summary below covers the earlier portion of the conversation.

Analysis:
Let me chronologically analyze the conversation:

Session Start: This is a continuation of a previous conversation that ran out of context. The summary from the previous session provides extensive background on the mtg-rl project and ECL implementation work.
Ralph Loop Task: The user activated a Ralph Loop with the goal of completing ECL implementation by working through ecl-todo.md items one at a time.
Previous session work recap: COND cards (7), SHOCK lands (5), COST cards (8), more COND improvements (6), LookTopAndPick engine feature (5 cards), PutOnLibrary engine feature (1 card) were completed. Session had uncommitted PutOnLibrary + MISC changes.
This session's work:

a. Committed PutOnLibrary + MISC changes (commit 53e666245a)
- Verified all tests pass (19 passed)
- Committed the previously uncommitted changes
b. GainControl/GainControlUntilEndOfTurn engine feature (commit 51f7def940)
- Read permanent.rs to understand controller field
- Added original_controller: Option<PlayerId> field to Permanent struct
- Implemented GainControl match arm (permanent controller change)
- Implemented GainControlUntilEndOfTurn match arm (controller change + untap + grant haste)
- Added cleanup revert for EOT control changes
- Updated Goatnap card to use gain_control_eot() with Creature targeting
- Added gain_control_until_end_of_turn test
- Error: First test attempt used crate::ai::AlwaysPassPlayer which doesn't exist in mtg-engine crate. Fixed by using test module's local AlwaysPassPlayer.
- Error: git add with wrong path prefix (mtg-rl/mtg-rl/). Fixed by running from correct directory.
- Updated ROADMAP.md and ecl-todo.md
- ECL progress: 126 complete, 141 remaining
c. 7 ECL card improvements batch (commit 4c7e0e22ea)
- Formidable Speaker: typed activated ability with Cost::pay_mana("{1}"), Cost::tap_self(), Effect::untap_target(), TargetSpec::Permanent
- Glamer Gifter: typed ETB with SetPowerToughness { power: 4, toughness: 4 }
- Retched Wretch: typed dies trigger with reanimate()
- Flamebraider: added mana ability Mana::red(2)
- Lavaleaper: added GrantKeyword haste static + mana doubling annotation
- Firdoch Core: added changeling keyword + mana ability + typed activated
- Foraging Wickermaw: typed ETB scry(1) + added mana ability
d. 8 more ECL card improvements (commit ddb8e5e74f)
- Mornsong Aria: typed statics (CantGainLife + CantDrawExtraCards) + triggered LoseLife { amount: 3 } + search_library("card")
- Tend the Sprigs: typed with search_library("basic land") + Custom conditional
- Sapling Nursery: added CostReduction static, landfall token trigger, exile activated
- Kinbinding: added begin-of-combat Kithkin token trigger with create_token("1/1 Kithkin", 1)
- Figure of Fable: added 3 level-up activated abilities with proper costs
- Kinscaer Sentry: used attacks_triggered with better description
- Checked off SHOCK engine support in todo
e. More ETB placeholder improvements (in progress, not yet committed)
- Lofty Dreams: typed ETB draw_cards(1) + static Boost and GrantKeyword for enchanted creature
- Stalactite Dagger: typed ETB create_token("1/1 Shapeshifter with changeling", 1) + boost static + equip ability
- Was about to improve Twilight Diviner when summary was requested
Key errors:
- crate::ai::AlwaysPassPlayer not found in mtg-engine crate scope. Fixed by using test module's local AlwaysPassPlayer.
- git add path issue (mtg-rl/ prefix when already in mtg-rl dir). Fixed by running from correct cwd.
User messages: Only the Ralph Loop activation and continuation prompt. No direct user questions this session.
Current state:
- ECL progress: ~126 complete, ~141 remaining (per last committed todo update)
- Uncommitted changes: Lofty Dreams and Stalactite Dagger improvements in ecl.rs
- Was about to improve Twilight Diviner (ETB surveil 2 → scry(2))
- Had found 15 cards with placeholder "ETB effect." and 5 with placeholder "Activated effect."
- Still many categories remaining: COND (~38), VIVID (11), CHOICE (10), TYPE (9), AURA (9), BEHOLD (8), MANA (8), COPY (7), MODAL (7), TRANSFORM (6), EVOKE (5), IMPULSE (5), EXILE_CAST (4), EQUIP (4), DELAYED (3), PW (2)
Git commits this session:
- 53e666245a — Add PutOnLibrary effect and update MISC ECL cards
- 51f7def940 — Implement GainControl and GainControlUntilEndOfTurn effects
- 4c7e0e22ea — Improve 7 ECL cards with typed effects and abilities
- ddb8e5e74f — Improve 8 more ECL cards with typed effects and better descriptions

Summary:

Primary Request and Intent:
The user activated a Ralph Loop with the directive: "Read @mtg-rl/docs/ecl-todo.md. Our goal is to complete the implementation of ECL by implementing engine capabilities and updating cards to use them. Work one task at a time until we are done. Read the corresponding java source to understand how to shape the implementation. Update the todo and leave a note as you progress. Add tests for each engine and for complex cards. Commit changes after each item. Then get another TODO item until the TODO is complete."

The completion promise is DONE — output only when ALL todo items are complete. This session is a continuation from a previous context that ran out of space.
Key Technical Concepts:
- Effect enum variants in abilities.rs — typed game effects vs Effect::Custom(String) no-ops
- GainControl/GainControlUntilEndOfTurn — New engine feature: change controller of a permanent. Until-EOT version tracks original_controller on Permanent for cleanup revert.
- Permanent.original_controller: Option<PlayerId> — New field for tracking temporary control changes, reverted during cleanup step
- Cleanup step (game.rs ~line 423-437) — Clears granted_keywords, removed_keywords, cant_block counters, and now reverts original_controller
- StaticEffect annotations — Boost, GrantKeyword, CantGainLife, CantDrawExtraCards, CostReduction, Ward, EntersTappedUnless are structured data but not mechanically enforced
- card_matches_filter() — Substring matching on lowercased filter against card types/subtypes
- AlwaysPassPlayer — Test-only decision maker in game.rs test module (NOT in crate::ai)
- Library data structure — top = index 0, draw() removes from 0, peek(n) returns &[0..n]
- Token stat parsing — CreateToken parses P/T and keywords from token_name strings
- Run commands from mtg-rl dir: cd /mnt/dest-btrfs/home/jc/src/mage/mtg-rl && cargo check -p mtg-cards
Files and Code Sections:
- mtg-rl/mtg-engine/src/permanent.rs
  - Added original_controller: Option<PlayerId> field for temporary control change tracking
  - Initialized to None in Permanent::new()
  rust
- mtg-rl/mtg-engine/src/game.rs
  - Added GainControl and GainControlUntilEndOfTurn match arms in execute_effects()
  rust
  - Added cleanup revert in cleanup step (~line 433):
  rust
  - Added gain_control_until_end_of_turn test using test module's AlwaysPassPlayer
  - The catch-all is at line ~1595: _ => { // Remaining effects not yet implemented (protection, etc.) }
- mtg-rl/mtg-engine/src/abilities.rs
  - Already had Effect::GainControl and Effect::GainControlUntilEndOfTurn variants with constructors gain_control() and gain_control_eot()
  - Previously added Effect::PutOnLibrary and Effect::LookTopAndPick (from prior session)
  - Key StaticEffect variants confirmed: CantGainLife, CantDrawExtraCards, CostReduction, Boost, GrantKeyword, Ward, EntersTappedUnless, CantBlock, CantAttack
- mtg-rl/mtg-cards/src/sets/ecl.rs — Extensively modified, 268 ECL cards
  - Goatnap: Effect::gain_control_eot() with TargetSpec::Creature
  - Formidable Speaker: Activated typed as Cost::pay_mana("{1}"), Cost::tap_self(), Effect::untap_target(), TargetSpec::Permanent
  - Glamer Gifter: ETB Effect::SetPowerToughness { power: 4, toughness: 4 } + Custom for all types
  - Retched Wretch: Dies trigger Effect::reanimate() + Custom conditional
  - Flamebraider: Added Ability::mana_ability(id, ..., Mana::red(2))
  - Lavaleaper: StaticEffect::GrantKeyword { filter: "creature".into(), keyword: "haste".into() } + mana doubling Custom
  - Firdoch Core: Added KeywordAbilities::CHANGELING, mana ability, typed activated for 4/4 animation
  - Foraging Wickermaw: ETB Effect::scry(1), added mana ability
  - Mornsong Aria: StaticEffect::CantGainLife, StaticEffect::CantDrawExtraCards, triggered with Effect::LoseLife { amount: 3 }, Effect::search_library("card")
  - Tend the Sprigs: Effect::search_library("basic land") + Custom conditional token
  - Sapling Nursery: CostReduction static, landfall token Effect::create_token("3/4 Treefolk with reach", 1), exile activated
  - Kinbinding: Combat trigger Effect::create_token("1/1 Kithkin", 1), EventType::BeginCombat
  - Figure of Fable: 3 activated abilities with costs "{G/W}", "{1}{G/W}{G/W}", "{3}{G/W}{G/W}{G/W}"
  - Kinscaer Sentry: Used Ability::attacks_triggered() with better description
  - Lofty Dreams (uncommitted): ETB draw_cards(1), static Boost + GrantKeyword for enchanted creature
  - Stalactite Dagger (uncommitted): ETB create_token("1/1 Shapeshifter with changeling", 1), equip ability
- mtg-rl/docs/ecl-todo.md
  - Updated from "125 complete | 142 remaining" to "126 complete | 141 remaining"
  - Checked off: CONTROL section (Goatnap), SHOCK engine support
  - MISC section engine support checked off with PutOnLibrary note
- mtg-rl/ROADMAP.md
  - Removed GainControl and GainControlUntilEndOfTurn from unimplemented effect list
  - Added PutOnLibrary, GainControl, GainControlUntilEndOfTurn to "Recently implemented" list
- mtg-rl/mtg-engine/src/state.rs — Read for reference
  - GameState has: players, turn_order, battlefield, stack, exile, card_store, ability_store, object_zones, turn/phase state, values HashMap
  - No per-turn tracking fields for EOT control changes (which is why original_controller was added to Permanent instead)
Errors and fixes:
- crate::ai::AlwaysPassPlayer not found: Test tried to reference AlwaysPassPlayer via crate::ai, but the ai module is in mtg-ai crate, not mtg-engine. Fixed by using the test module's local AlwaysPassPlayer struct (defined at game.rs line 1986).
- git add path mismatch: Ran git add mtg-rl/mtg-engine/... but cwd was already /mnt/dest-btrfs/home/jc/src/mage/mtg-rl, causing "pathspec did not match". Fixed by using paths without the mtg-rl/ prefix.
Problem Solving:
- GainControlUntilEndOfTurn cleanup: Needed a mechanism to revert temporary control changes at end of turn. Considered adding a Vec to GameState vs adding a field to Permanent. Chose original_controller: Option<PlayerId> on Permanent since the cleanup step already iterates all permanents and it's cleaner.
- Systematic card improvement: Rather than implementing complex engine features, focused on replacing Custom effects with existing typed variants across many cards, maximizing improvement per effort.
- Placeholder identification: Found 15 cards with "ETB effect." placeholder and 5 with "Activated effect." placeholder, systematically improving the most typeable ones.
- StaticEffect as annotation: Confirmed that StaticEffect variants are structural annotations only — game.rs doesn't enforce them. Still valuable for structured data representation.
All user messages:
- (Ralph Loop activation from previous session): "Read @mtg-rl/docs/ecl-todo.md. Our goal is to complete the implementation of ECL by implementing engine capabilities and updating cards to use them. Work one task at a time until we are done. Read the corresponding java source to understand how to shape the implementation. Update the todo and leave a note as you progress. Add tests for each engine and for complex cards. Commit changes after each item. Then get another TODO item until the TODO is complete."
- (Continuation prompt): "Please continue the conversation from where we left off without asking the user any further questions. Continue with the last task that you were working on."
Pending Tasks:
- Uncommitted changes: Lofty Dreams and Stalactite Dagger improvements need to be committed
- Continue improving placeholder ETB cards: Twilight Diviner (surveil 2 → scry(2)), Puca's Eye (draw + color choice), Lluwen (mill 4 + library manipulation), and others from the 15 placeholder ETB cards
- Continue Ralph Loop: 141 cards remain in ecl-todo.md
- Remaining sections: COND (~38 unchecked), VIVID (11), CHOICE (10), TYPE (9), AURA (9), BEHOLD (8), MANA (8), COPY (7), MODAL (7), TRANSFORM (6), MISC (1 - Mutable Explorer), EVOKE (5), IMPULSE (5), EXILE_CAST (4), EQUIP (4), DELAYED (3), PW (2), CONTROL (done)
Current Work:
I was in the middle of batch-improving ECL cards with placeholder "ETB effect." strings. I had already improved Lofty Dreams and Stalactite Dagger (uncommitted), and was about to improve Twilight Diviner. The current Twilight Diviner implementation (ecl.rs line ~3656):

rust

Java source shows ETB: surveil 2 + triggered: creatures from GY entering create token copy (once per turn). The ETB can be typed as scry(2) (surveil approximation). The second ability is a complex COPY mechanic.

I also had a list of 13 remaining placeholder ETB cards to potentially improve: Gathering Stone, Gilt-Leaf's Embrace, Lluwen, Pitiless Fists, Prismatic Undercurrents, Puca's Eye, Rhys the Evermore, Selfless Safewright, Sunderflock, Taster of Wares, Vibrance, Wistfulness.
Optional Next Step:
Continue improving placeholder ETB cards in ecl.rs (Twilight Diviner, Puca's Eye, Lluwen, etc.), then compile, test, and commit the batch. Then continue the Ralph Loop by picking the next TODO item from ecl-todo.md. Per the task: "Work one task at a time until we are done. Read the corresponding java source to understand how to shape the implementation. Update the todo and leave a note as you progress. Add tests for each engine and for complex cards. Commit changes after each item."

Git commits this session:
- 53e666245a — Add PutOnLibrary effect and update MISC ECL cards
- 51f7def940 — Implement GainControl and GainControlUntilEndOfTurn effects
- 4c7e0e22ea — Improve 7 ECL cards with typed effects and abilities
- ddb8e5e74f — Improve 8 more ECL cards with typed effects and better descriptions

If you need specific details from before compaction (like exact code snippets, error messages, or content you generated), read the full transcript at: /mnt/dest-btrfs/home/jc/.claude/projects/-mnt-dest-btrfs-home-jc-src-mage/e07a46c3-f679-4564-bf46-91c0873f11e0.jsonl
Please continue the conversation from where we left off without asking the user any further questions. Continue with the last task that you were asked to work on.

Let me check the current state of things and continue from where I left off.

git add mtg-rl/docs/ecl-dependency-graph.md mtg-rl/mtg-cards/src/sets/ecl.rs && git commit -m "$(cat <<'EOF'
Triage all 91 RESEARCH cards in ECL dependency graph

Analyzed Java sources for all 91 cards previously in the RESEARCH
section and categorized them by engine capability needed. Added a new
TRANSFORM/DFC category for 7 double-faced cards. 60 single-dependency
and 31 multi-dependency cards now have proper edges in the graph.
Added ENGINE DEPS comments to all 91 card functions in ecl.rs.

RESEARCH section is now empty — all 181 incomplete cards are categorized.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
EOF
)"

[master 7b2b06c5f8] Triage all 91 RESEARCH cards in ECL dependency graph
 2 files changed, 589 insertions(+), 1 deletion(-)
 create mode 100644 mtg-rl/docs/ecl-dependency-graph.md

>git log --oneline -8

ddb8e5e74f Improve 8 more ECL cards with typed effects and better descriptions
4c7e0e22ea Improve 7 ECL cards with typed effects and abilities
51f7def940 Implement GainControl and GainControlUntilEndOfTurn effects
53e666245a Add PutOnLibrary effect and update MISC ECL cards
a06f889ad1 Add LookTopAndPick effect for Eclipsed cycle (5 cards)
a37d4e8a82 Improve 6 COND cards with typed effects replacing Custom stubs
1fabeb9cff Implement 8 COST category cards with typed effects and counter costs
af3458e205 Add static effect enforcement gap to ROADMAP

Good - I have uncommitted changes to ecl.rs (Lofty Dreams and Stalactite Dagger improvements). Let me continue improving more placeholder ETB cards, then compile and commit the batch. Let me first read the current ecl-todo.md to know exactly what I'm working on.

Let me check my uncommitted changes and continue improving placeholder cards.

>git diff mtg-cards/src/sets/ecl.rs

diff --git a/mtg-rl/mtg-cards/src/sets/ecl.rs b/mtg-rl/mtg-cards/src/sets/ecl.rs
index b0fbaf48a4..208449b0b4 100644
--- a/mtg-rl/mtg-cards/src/sets/ecl.rs
+++ b/mtg-rl/mtg-cards/src/sets/ecl.rs
@@ -3020,22 +3020,23 @@ fn loch_mare(id: ObjectId, owner: PlayerId) -> CardData {
         ],
         ..Default::default() }
 }
-
+// ENGINE DEPS: [AURA] Convoke, enchant creature, ETB draw, +2/+2 and flying
 fn lofty_dreams(id: ObjectId, owner: PlayerId) -> CardData {
+    // Aura {3}{U}{U}. Convoke. ETB: draw a card. Enchanted creature gets +2/+2 and has flying.
     CardData { id, owner, name: "Lofty Dreams".into(),
         mana_cost: ManaCost::parse("{3}{U}{U}"),
         card_types: vec![CardType::Enchantment],
         subtypes: vec![SubType::Aura],
         rarity: Rarity::Uncommon,
-        keywords: KeywordAbilities::FLYING,
         abilities: vec![
             Ability::enters_battlefield_triggered(id,
-                    "When this enters, trigger effect.",
-                    vec![Effect::Custom("ETB effect.".into())],
-                    TargetSpec::Creature),
+                "When this Aura enters, draw a card.",
+                vec![Effect::draw_cards(1)],
+                TargetSpec::None),
             Ability::static_ability(id,
-                    "Static effect.",
-                    vec![StaticEffect::Custom("Static effect.".into())]),
+                "Enchanted creature gets +2/+2 and has flying.",
+                vec![StaticEffect::Boost { filter: "enchanted creature".into(), power: 2, toughness: 2 },
+                     StaticEffect::GrantKeyword { filter: "enchanted creature".into(), keyword: "flying".into() }]),
         ],
         ..Default::default() }
 }
@@ -3486,8 +3487,9 @@ fn spry_and_mighty(id: ObjectId, owner: PlayerId) -> CardData {
         ],
         ..Default::default() }
 }
-
+// ENGINE DEPS: [EQUIP] ETB: Shapeshifter token with changeling. Equip {2}, equipped gets +1/+1 + all types.
 fn stalactite_dagger(id: ObjectId, owner: PlayerId) -> CardData {
+    // Artifact Equipment {2}. ETB: create 1/1 Shapeshifter with changeling. Equip: +1/+1 + all types.
     CardData { id, owner, name: "Stalactite Dagger".into(),
         mana_cost: ManaCost::parse("{2}"),
         card_types: vec![CardType::Artifact],
@@ -3495,12 +3497,17 @@ fn stalactite_dagger(id: ObjectId, owner: PlayerId) -> CardData {
         rarity: Rarity::Common,
         abilities: vec![
             Ability::enters_battlefield_triggered(id,
-                    "When this enters, trigger effect.",
-                    vec![Effect::Custom("ETB effect.".into())],
-                    TargetSpec::None),
+                "When this Equipment enters, create a 1/1 colorless Shapeshifter creature token with changeling.",
+                vec![Effect::create_token("1/1 Shapeshifter with changeling", 1)],
+                TargetSpec::None),
             Ability::static_ability(id,
-                    "Static effect.",
-                    vec![StaticEffect::Custom("Static effect.".into())]),
+                "Equipped creature gets +1/+1 and is all creature types.",
+                vec![StaticEffect::Boost { filter: "equipped creature".into(), power: 1, toughness: 1 }]),
+            Ability::activated(id,
+                "Equip {2}",
+                vec![Cost::pay_mana("{2}")],
+                vec![Effect::Custom("Equip".into())],
+                TargetSpec::CreatureYouControl),
         ],
         ..Default::default() }
 }

Good, I have Lofty Dreams and Stalactite Dagger improvements. Let me continue improving more placeholder cards. Let me find remaining cards with placeholder "ETB effect." strings and also check which ones I was about to work on.

>grep -n 'ETB effect\.' mtg-cards/src/sets/ecl.rs

2687:                    vec![Effect::Custom("ETB effect.".into())],
2719:                    vec![Effect::Custom("ETB effect.".into())],
2985:                    vec![Effect::Custom("ETB effect.".into())],
3198:                    vec![Effect::Custom("ETB effect.".into())],
3216:                    vec![Effect::Custom("ETB effect.".into())],
3234:                    vec![Effect::Custom("ETB effect.".into())],
3330:                    vec![Effect::Custom("ETB effect.".into())],
3401:                    vec![Effect::Custom("ETB effect.".into())],
3543:                    vec![Effect::Custom("ETB effect.".into())],
3609:                    vec![Effect::Custom("ETB effect.".into())],
3666:                    vec![Effect::Custom("ETB effect.".into())],
3726:                    vec![Effect::Custom("ETB effect.".into())],
3807:                    vec![Effect::Custom("ETB effect.".into())],

>grep -n 'Activated effect\.' mtg-cards/src/sets/ecl.rs

2651:                    vec![Effect::Custom("Activated effect.".into())],
2990:                    vec![Effect::Custom("Activated effect.".into())],
3346:                    vec![Effect::Custom("Activated effect.".into())],
3470:                    vec![Effect::Custom("Activated effect.".into())],
3592:                    vec![Effect::Custom("Activated effect.".into())],

200 of 3097