Implement New Game Effect and Continue Work Queue

Summary

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Caveat: Caveat: The messages below were generated by the user while running local commands. DO NOT respond to these messages or otherwise consider them in your response unless the user explicitly asks you to.

Readabilities.rs

The test used the wrong constructor. Let me check how other tests in that file create a Game:

Readgame.rs20 lines

Readgame.rs30 lines

I see — it uses Game::new_two_player with GameConfig. Let me also check what make_deck does:

Greppedfn make_deck

Now let me fix my test to use the correct constructor pattern:

All 254 tests pass. Now let me update the docs. First, check the remediation docs and update them.

GreppedDarkness Descends

GreppedBarrensteppe Siege

GreppedAddCountersAll

Readgame.rs

Readecl-remediation.md5 lines

Readtdm-remediation.md5 lines

Now update ROADMAP.md:

Greppedcounter|Counter

ReadROADMAP.md8 lines

ReadROADMAP.md10 lines

ReadROADMAP.md3 lines

Now check off the batch in work-queue.md and update it with the TDM card:

GreppedPut two -1/-1 counters on each creature

Now let me proceed to Batch 10: Compound self-counter + target effects. Let me read the batch and investigate:

Readwork-queue.md25 lines

Let me check the current state of these cards:

Greppedwarren_torchmaster|Warren Torchmaster

Greppeddream_seizer|Dream Seizer

Interesting! Dream Seizer was already fixed in Batch 3 — it's using Effect::add_counters("-1/-1", 1) and Effect::discard_opponents(1). That's already working since Batch 2's source fallback lets AddCounters target self when there are no explicit targets.

Warren Torchmaster is more interesting. It currently has:

Effect::Custom("Put a -1/-1 counter on Warren Torchmaster. Target creature gains haste until end of turn.")
TargetSpec::Creature

This is a compound effect: put a -1/-1 counter on self AND give target creature haste.

The self-counter uses the Batch 2 source fallback (no targets needed), and the haste uses the target. Both add_counters("-1/-1", 1) and gain_keyword_eot("haste") already exist. The real issue is whether combining a self-targeting effect with a separate target effect in one resolution works correctly — when execute_effects iterates through them, the add_counters call needs to ignore the selected target and apply to self instead, while gain_keyword_eot applies to the selected creature.

Looking at how AddCounters works, it checks if targets are empty to decide between self-targeting and applying to selected targets. But since the haste effect already populated the targets list, the counter effect would incorrectly apply the -1/-1 to the target creature instead of self — exactly the problem the batch was flagging about combining these effects in one resolution.

The fight/bite approach from earlier won't work here since this isn't a fight effect. The real fix is to model the blight cost as an actual Cost::Blight(1) rather than as an effect, which would keep the self-targeting counter separate from the target-dependent haste ability. If you do, target creature gains haste until end of turn." This is structured as an optional triggered ability with a conditional effect—the trigger fires, then you may pay the cost of putting a -1/-1 counter on Warren Torchmaster, and if you do, the target creature gets haste. I need to check whether triggered abilities in this engine support costs, since that's the key to modeling this correctly.

Dream Seizer is already fixed from Batch 3. The key question is whether Warren Torchmaster's compound self-counter + target effect works correctly. Let me investigate how effect resolution handles targets when mixing self-counter and target effects:

Readgame.rs15 lines

OK, so the current execute_effects passes ALL targets to each effect. For Warren Torchmaster, if the ability has [Effect::add_counters("-1/-1", 1), Effect::gain_keyword_eot("haste")] and TargetSpec::Creature:

When the ability resolves, all_targets will contain the target creature
For add_counters("-1/-1", 1), targets will not be empty (it has the target creature), so it'll put the -1/-1 counters on the TARGET creature instead of self
For gain_keyword_eot("haste"), targets will have the target creature, which is correct

The issue is that add_counters applies to targets when present, but I need the -1/-1 to go on the caster instead. Rather than trying to fix the effect system, I could use Cost::Blight(1) as the cost of the triggered ability instead, which would handle the self-counter naturally. Let me see if the engine supports costs on triggered abilities.

Let me check how triggered ability resolution handles costs:

Greppedresolve.*ability|ability.*resolve|triggered.*cost|Triggered.*cost

Greppedfn resolve_top_of_stack

API Error: 401 {"type":"error","error":{"type":"authentication_error","message":"OAuth token has expired. Please obtain a new token or refresh your existing token."},"request_id":"req_011CY8AdB9bgCSEN5higyL9A"} · Please run /login

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Let me search for the relevant sections in game.rs and the card in the ECL set file.

GreppedPut two -1/-1 counters on each creature

GreppedAddCounters \{|AddCounters\b

GreppedDestroyAll|DealDamageAll

Let me see the full AddCounters match arm and the ECL card context.

Readgame.rs30 lines

Readecl.rs15 lines

Session command

GreppedEffect::(Custom|BoostAllUntil|GrantKeywordAll)

Let me also check for any other cards across all sets that might use this same pattern.

Greppedcounters? on (each|all|every) creature

Greppedcounters? on each

Good. I found additional cards that could use AddCountersAll:

ECL: Darkness Descends (line 1843) — "Put two -1/-1 counters on each creature." → Simple AddCountersAll { counter_type: "-1/-1", count: 2, filter: "creatures" }
TDM line 2037 — "Put +1/+1 counter on each creature you control." → AddCountersAll { counter_type: "+1/+1", count: 1, filter: "creatures you control" } — this is the Abzan end step trigger. Let me check this card.
TDM line 3806 — Felothar has a sacrifice effect followed by countering creatures, but the conditional logic and reflexive trigger make it too complex to handle right now.

Most of the remaining candidates involve distribution mechanics, X-costs, or graveyard interactions that complicate things. Let me look at the TDM card around line 2025 to verify the second one.

Let me check the TDM card that also uses counters on each creature.

Read docs/work-queue.md and do the next unchecked batch. For each batch:

Read the engine files (mtg-engine/src/abilities.rs, mtg-engine/src/game.rs) to understand current Effect/StaticEffect variants
If the batch has a NOTE about uncertainty, investigate first and update the queue with findings before committing the fix
If engine work is needed: add the variant, constructor, and match arm, and look for the Java implementation to see the bigger picture
Add a test for any new engine effect (follow the pattern in game.rs mod tests)
Fix all cards listed in the batch (grep to find exact lines, fix across all 4 set files)
cargo check -p mtg-cards && cargo test --lib
Update docs: mark cards in docs/{fdn,tla,tdm,ecl}-remediation.md, update ROADMAP.md
Check off the batch in docs/work-queue.md with today's date
If you discover new cards that fit the current or a future batch while working, add them to the queue

If a batch turns out to be wrong or more complex than described, update the queue with what you learned and move on to the next one.

Readtdm.rs25 lines

Readtdm.rs20 lines

OK, so for Batch 9:

Darkness Descends (ECL line 1843) — straightforward: "Put two -1/-1 counters on each creature."
Barrensteppe Siege (TDM line 2037) — the Abzan mode: "Put +1/+1 counter on each creature you control." — This is a modal card (choose Abzan or Mardu), but the effect itself is straightforward. I can fix just the effect part even though the modal choice isn't modeled yet.
Felothar (TDM line 3806) — compound: sacrifice + then put +1/+1 counter on each creature. The sacrifice part is conditional ("you may sacrifice"), so this is complex. I'll defer this.
Now I need to check how the matches_filter function handles creature targeting, since I'll need to distinguish between "all creatures" and "creatures you control" for these effects.

Let me check how matches_filter works to understand filter handling for the new effect.

Greppedfn matches_filter

Readgame.rs30 lines

I'll start by reading the work queue to find the next unchecked batch.

Good. Now I have all the context I need. Let me also find where in execute_effects I should insert the new match arm — right after AddCounters seems logical. Let me also look at the test section of game.rs for the existing AddCounters test.

Readgame.rs50 lines

Now I have the full picture. Let me find the end of the execute_effects match block to know exactly where to insert the new arm. Let me look for the Custom catch-all:

GreppedEffect::Custom\(

GreppedEffect::Custom

GreppedCustom\(

Readwork-queue.md

Grepped^\s+_\s+=>\s*\{

Good. The catch-all _ => at line 1510 is the end of the execute_effects match. I'll add the new match arm before that. Now let me implement everything.

Readgame.rs20 lines

Now I have everything I need. Let me implement:

Add AddCountersAll variant to Effect enum in abilities.rs
Add add_counters_all() constructor
Add match arm in game.rs execute_effects
Add test in game.rs
Fix cards in ecl.rs and tdm.rs

Now add the constructor:

Now add the match arm in game.rs, right before the catch-all:

Now add the test. Let me find the end of the existing test section:

Greppedfn (add_counters_self|discard_opponents|boost_all_and|fight_and|compound_bite)

Greppedfn compound_bite

Grepped^ \}$

Readgame.rs50 lines

Now I'll add the test right before the closing } of the test module:

Now fix the cards. First, Darkness Descends in ecl.rs:

The next unchecked batch is Batch 9: AddCountersAll. Let me read the engine files and find the card.

Now fix Barrensteppe Siege in tdm.rs:

Now let's build and test: