✅ Buer attack exhausts then passive heals allies

Category	Interaction
Status	Passing
Test	tests/test_abilities_passive.py::test_buer_attack_exhausts_then_passive_heals_allies

Tests interaction between Buer, Sabnock, Morax.

Preconditions

• P1 Main Phase, P1 has 3 AP

• Lane 0: P1's Buer (#014) — 12 HP, PWR=3, 0 damage, READIED

• Lane 0: P1's Ally A (Sabnock #003) — 15 HP, 5 damage, READIED

• Lane 0: P1's Ally B (Morax #006) — 12 HP, 8 damage, READIED

• Lane 0: P2's Enemy (any) — 12 HP, 0 damage, READIED

• Lane 1: P1's Ally C (distant, Azag #066) — 9 HP, 6 damage, READIED

• Buer passive registered: after exhaust, heal local allies by PWR

Action

• P1 attacks with Buer targeting the enemy (2 AP, exhaust)

• Buer exhausts → DEMON_EXHAUSTED event fires

• Buer's passive triggers: remove 3 damage from each Other Local Allied Demon

from engine.operations import deal_damage, exhaust_demon, get_effective_pwr
    from engine.events import fire_event, GameEvent, EventType, clear_triggers
    import importlib
    import engine.abilities_passive
    clear_triggers()
    importlib.reload(engine.abilities_passive)

    buer = make_demon("014", lane=0, owner=Side.PLAYER_1)
    ally_a = make_demon("003", lane=0, owner=Side.PLAYER_1, damage=5)
    ally_b = make_demon("006", lane=0, owner=Side.PLAYER_1, damage=8)
    enemy = make_demon("004", lane=0, owner=Side.PLAYER_2)
    ally_c = make_demon("066", lane=1, owner=Side.PLAYER_1, damage=6)  # distant

    state = make_game_state(phase=Phase.MAIN, current_player=Side.PLAYER_1)
    state.players[Side.PLAYER_1].ap = 3
    state = place_demon(state, buer)
    state = place_demon(state, ally_a)
    state = place_demon(state, ally_b)
    state = place_demon(state, enemy)
    state = place_demon(state, ally_c)

    buer_p = state.demons[0]
    enemy_p = state.demons[3]

    # Buer attacks enemy — deal PWR damage
    pwr = get_effective_pwr(state, buer_p)

Expected Postconditions

• Enemy: took 3 damage (Buer's PWR, no DEF)

• Buer: EXHAUSTED, 0 damage (passive says "Other" — Buer does NOT heal itself)

• Ally A (lane 0): 2 damage (was 5, healed 3 by Buer's PWR)

• Ally B (lane 0): 5 damage (was 8, healed 3)

• Ally C (lane 1): 6 damage unchanged (different lane — passive is Local only)

Assertions

assert pwr == 3, f"Buer PWR should be 3, got {pwr}"
    state = deal_damage(state, buer_p, enemy_p, pwr)

    # Exhaust Buer (attack requires exhaust)
    buer_ref = next(d for d in state.demons if d.unit_id == "014")
    state = exhaust_demon(state, buer_ref)

    # Fire DEMON_EXHAUSTED event — Buer's passive should trigger
    buer_ref = next(d for d in state.demons if d.unit_id == "014")
    event = GameEvent(
        event_type=EventType.DEMON_EXHAUSTED,
        source=buer_ref,
        target=buer_ref,
        value=None,
        side=Side.PLAYER_1,
        lane=0,
    )
    result = fire_event(state, event)

    # Verify enemy took damage
    enemy_after = next(d for d in result.demons if d.unit_id == "004")
    assert enemy_after.damage == 3, f"Enemy should have 3 damage from Buer's attack. Got {enemy_after.damage}"

    # Verify Buer is exhausted and NOT healed (passive says "Other")
    buer_after = next(d for d in result.demons if d.unit_id == "014")
    assert buer_after.state == DemonState.EXHAUSTED
    assert buer_after.damage == 0, "Buer should NOT heal itself (passive says Other)"

    # Verify Ally A healed: 5 - 3 = 2
    ally_a_after = next(d for d in result.demons if d.unit_id == "003")
    assert ally_a_after.damage == 2, (
        f"Ally A should have 2 damage (5 - 3 healed by Buer PWR). Got {ally_a_after.damage}"
    )

    # Verify Ally B healed: 8 - 3 = 5
    ally_b_after = next(d for d in result.demons if d.unit_id == "006")
    assert ally_b_after.damage == 5, (
        f"Ally B should have 5 damage (8 - 3 healed by Buer PWR). Got {ally_b_after.damage}"
    )

    # Verify Ally C NOT healed (different lane — passive is Local)
    ally_c_after = next(d for d in result.demons if d.unit_id == "066")
    assert ally_c_after.damage == 6, (
        f"Ally C should still have 6 damage (different lane, not healed). Got {ally_c_after.damage}"
    )