fix(rules): correct the evil eye hex

PF1e (APG Evil Eye): the target takes -2 on ONE chosen option (AC, ability checks, attack rolls, saving throws or skill checks) for 3 rounds, and "A Will save reduces this to just 1 round" — it never negates. _hex_evil_eye applied shaken (-2 attack AND saves) for 1 round with the save negating entirely. It now adds a targeted -2 attack ActiveBuff for 3 rounds, or 1 round on a successful Will save. Simplification documented in README: the option choice is not modeled (attack rolls are the engine's target). The hex-DC behavioral test now reads the -2 attack (3r) transcript line.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

README.md

@@ -1094,7 +1094,11 @@ Règles modélisées :
 - Combat Reflexes : 1 AoO par combattant par round par défaut ; avec le don Combat
   Reflexes, `1 + mod de Dextérité` AoO par round (`_aoo_allowance`, plancher 1).
 - Sortilèges du sorcier (witch hex) : le DD vaut `10 + niveau//2 + mod d'Intelligence`
-  (evil_eye, slumber, cackle) ; `cackle` prolonge d'un round les sortilèges déjà
+  (evil_eye, slumber, cackle) ; `evil_eye` (APG, conformance D3) inflige −2 à
+  **une seule option** — l'option choisie est modélisée par les jets d'attaque —
+  pendant **3 rounds** ; une sauvegarde de Volonté réussie ne l'annule pas mais
+  **réduit la durée à 1 round** (« A Will save reduces this to just 1 round ») ;
+  `cackle` prolonge d'un round les sortilèges déjà
   actifs, sur une liste instantanée pour ne pas s'étendre à l'infini. Les sorts à
   zone (AoE) utilisent le DD d'incantation du jeteur et chaque créature de la
   zone effectue la sauvegarde listée par le sort (Volonté / Réflexes /

src/pf1e_simulator/combat.py

@@ -4756,27 +4756,28 @@ class CombatEngine:
         elif hex_name == "cackle":
             self._hex_cackle(state, target)
 
+    _EVIL_EYE_ROUNDS = 3
+    _EVIL_EYE_SAVED_ROUNDS = 1
+
     def _hex_evil_eye(
         self, state: CombatantState, target: CombatantState, hex_dc: int
     ) -> None:
-        """Evil Eye: shaken (-2 AC or saves), 1 round, Will negates."""
+        """Evil Eye (APG): -2 on one chosen option for 3 rounds; a Will save
+        reduces it to 1 round (never negates). Simplification: the chosen
+        option is attack rolls — the engine's other hex targets are not
+        selectable per cast."""
         save_result = self.resolve_save(target, "will", hex_dc)
-        if save_result.success:
-            self._log(
-                f"round {self._current_round} {state.combatant.id}: evil eye on "
-                f"{target.combatant.id} -> SAVED"
-            )
-            return
-        target.active_conditions.append(
-            ActiveCondition(
-                condition=CONDITIONS_BY_NAME["shaken"],
-                rounds_left=1,
+        rounds = self._EVIL_EYE_SAVED_ROUNDS if save_result.success else self._EVIL_EYE_ROUNDS
+        target.active_buffs.append(
+            ActiveBuff(
+                modifiers=(StatModifier(target="attack", value=-2),),
+                rounds_left=rounds,
                 source=f"hex: evil_eye by {state.combatant.id}",
             )
         )
         self._log(
             f"round {self._current_round} {state.combatant.id}: evil eye on "
-            f"{target.combatant.id} -> shaken (1r)"
+            f"{target.combatant.id} -> -2 attack ({rounds}r)"
         )
 
     def _hex_slumber(

tests/test_class_abilities.py

@@ -255,6 +255,45 @@ def test_nairda_hex_spends_resource() -> None:
     assert me.resources_left["hexes"] == 4
 
 
+def test_evil_eye_failed_save_deals_minus_two_attack_three_rounds() -> None:
+    """APG Evil Eye: -2 on one chosen option, 3 rounds; Will does not negate.
+    Given: a target that fails the Will save (d20 2 +4 < DC 14)
+    When: the witch hexes it
+    Then: a -2 attack modifier is applied for 3 rounds (no shaken condition)."""
+    nairda = _combatant("nairda", resources={"hexes": 5})
+    goblin = _combatant("goblin", hp_max=6)
+    engine, me, enemy = _engine(nairda, [goblin], rng_queue=[2])
+
+    engine._execute(
+        me, Action(kind="hex", target_id=enemy[0].combatant.id, hex_name="evil_eye")
+    )
+
+    hex_buffs = [b for b in enemy[0].active_buffs if b.source.startswith("hex: evil_eye")]
+    assert len(hex_buffs) == 1
+    assert hex_buffs[0].rounds_left == 3
+    assert hex_buffs[0].modifiers == (StatModifier(target="attack", value=-2),)
+    assert not any(ac.condition.name == "shaken" for ac in enemy[0].active_conditions)
+
+
+def test_evil_eye_saved_deals_minus_two_attack_one_round() -> None:
+    """APG Evil Eye: "A Will save reduces this to just 1 round" — the penalty
+    still lands. Given: a target that saves (natural 20)
+    When: the witch hexes it
+    Then: the -2 attack modifier is applied for exactly 1 round."""
+    nairda = _combatant("nairda", resources={"hexes": 5})
+    goblin = _combatant("goblin", hp_max=6)
+    engine, me, enemy = _engine(nairda, [goblin], rng_queue=[20])
+
+    engine._execute(
+        me, Action(kind="hex", target_id=enemy[0].combatant.id, hex_name="evil_eye")
+    )
+
+    hex_buffs = [b for b in enemy[0].active_buffs if b.source.startswith("hex: evil_eye")]
+    assert len(hex_buffs) == 1
+    assert hex_buffs[0].rounds_left == 1
+    assert hex_buffs[0].modifiers == (StatModifier(target="attack", value=-2),)
+
+
 # --- tammara: deeds ---
 
 

tests/test_hex_aoe_dr.py

@@ -110,8 +110,9 @@ class TestHexDcUsesInt:
     Then: DC = 10 + 4//2 + (21-10)//2 = 17.
 
     Behavioral test: target has Will +2. d20=13 -> total 15.
-    DC 17: 15 < 17 -> fail -> shaken applied.
-    DC 12 (wrong, uses CHA): 15 >= 12 -> success -> no effect.
+    DC 17: 15 < 17 -> fail -> the -2 attack hex lands for its full 3 rounds
+    (APG Evil Eye: a save only reduces the duration to 1 round).
+    DC 12 (wrong, uses CHA): 15 >= 12 -> "saved" -> 1 round.
     """
 
     def test_hex_dc_uses_int_not_cha(self) -> None:
@@ -119,7 +120,7 @@ class TestHexDcUsesInt:
         target = _make_target(hp_max=100)
         engine, c, t = _make_engine(caster, target, [13])
         engine._execute_hex(c, t, "evil_eye")
-        assert any("shaken" in line for line in engine._transcript)
+        assert any("-2 attack (3r)" in line for line in engine._transcript)
 
 
 class TestAoEDcEqualsCasterSpellDc: