diff --git a/apps/api/src/combat/entities/combat.entity.ts b/apps/api/src/combat/entities/combat.entity.ts
index ed0bea8..bc54296 100644
--- a/apps/api/src/combat/entities/combat.entity.ts
+++ b/apps/api/src/combat/entities/combat.entity.ts
@@ -26,6 +26,9 @@ export interface CombatMonsterState extends CombatCombatantState {
   // Snapshotted from MonsterDefinition when the fight starts, so retuning
   // content mid-fight cannot change the rules of a running combat.
   abilities: MonsterAbilities;
+  // Snapshotted monster combat state persisted during the fight.
+  activeGuard?: { remainingRounds: number; armorBonus: number };
+  enraged?: boolean;
 }
 
 export interface CombatPlayerState extends CombatCombatantState {