Add Unravel

[jason020818]

Summary

Adds engine support for Unravel.

Files changed

• crates/engine/src/parser/oracle_effect/conditions.rs
• crates/engine/tests/integration/main.rs
• crates/engine/tests/integration/unravel_counter_mana_value.rs

CR references

CR 118.9 (mana spent vs mana value), CR 701.59a

Track

Developer

LLM

Model: claude-sonnet-4-6
Thinking: high
Tier: Standard

Gate A

./scripts/check-parser-combinators.sh — clean (exit 0)

Anchored on

• crates/engine/src/parser/oracle_effect/conditions.rs — existing conditional spell-effect parsers using parse_*_condition
• crates/engine/tests/integration/ — integration test pattern for counter + conditional draw cards

Verification

• ./scripts/check-parser-combinators.sh — clean
• cargo test -p engine --test integration unravel_counter_mana_value — 1 pass / 0 fail

Scope Expansion

None.

Validation Failures

None.

CI Failures

None.

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[matthewevans]

Superseded by #3618, which just merged — your Unravel parser is in main with your authorship preserved (the commit is cherry-picked under your name), plus the cast→resolve runtime test the bar requires (it asserts the draw fires only when mana spent < mana value, and fails on revert). The card is live. Closing this as superseded; thank you for the parser work. (The AST-shape-only test here was the same gap that closed #3573 — the runtime test was what it needed.)