diff --git a/lib/data/race_data.dart b/lib/data/race_data.dart
index c883111..59988be 100644
--- a/lib/data/race_data.dart
+++ b/lib/data/race_data.dart
@@ -151,9 +151,9 @@ class RaceData {
     },
     passives: [
       PassiveAbility(
-        type: PassiveType.deathEquipmentPreserve,
-        value: 1.0,
-        description: '사망 시 장비 1개 유지',
+        type: PassiveType.defenseBonus,
+        value: 0.10,
+        description: '방어력 +10%',
       ),
     ],
   );
diff --git a/lib/src/core/model/combat_state.dart b/lib/src/core/model/combat_state.dart
index 3140b3f..c393234 100644
--- a/lib/src/core/model/combat_state.dart
+++ b/lib/src/core/model/combat_state.dart
@@ -21,6 +21,7 @@ class CombatState {
     this.activeDoTs = const [],
     this.lastPotionUsedMs = 0,
     this.activeDebuffs = const [],
+    this.isFirstPlayerAttack = true,
   });
 
   /// 플레이어 전투 스탯
@@ -59,6 +60,9 @@ class CombatState {
   /// 몬스터에 적용된 활성 디버프 목록
   final List<ActiveBuff> activeDebuffs;
 
+  /// 첫 번째 플레이어 공격 여부 (firstStrikeBonus 적용용)
+  final bool isFirstPlayerAttack;
+
   // ============================================================================
   // 유틸리티
   // ============================================================================
@@ -124,6 +128,7 @@ class CombatState {
     List<DotEffect>? activeDoTs,
     int? lastPotionUsedMs,
     List<ActiveBuff>? activeDebuffs,
+    bool? isFirstPlayerAttack,
   }) {
     return CombatState(
       playerStats: playerStats ?? this.playerStats,
@@ -140,6 +145,7 @@ class CombatState {
       activeDoTs: activeDoTs ?? this.activeDoTs,
       lastPotionUsedMs: lastPotionUsedMs ?? this.lastPotionUsedMs,
       activeDebuffs: activeDebuffs ?? this.activeDebuffs,
+      isFirstPlayerAttack: isFirstPlayerAttack ?? this.isFirstPlayerAttack,
     );
   }
 
diff --git a/lib/src/core/model/race_traits.dart b/lib/src/core/model/race_traits.dart
index 1960e50..7dd5503 100644
--- a/lib/src/core/model/race_traits.dart
+++ b/lib/src/core/model/race_traits.dart
@@ -20,9 +20,6 @@ enum PassiveType {
 
   /// MP 배율 보너스
   mpBonus,
-
-  /// 사망 시 장비 보존
-  deathEquipmentPreserve,
 }
 
 /// 패시브 능력 (passive ability)