diff --git a/apps/api/src/combat/combat.errors.ts b/apps/api/src/combat/combat.errors.ts
index bc125ba..2028e4b 100644
--- a/apps/api/src/combat/combat.errors.ts
+++ b/apps/api/src/combat/combat.errors.ts
@@ -8,7 +8,8 @@ export type CombatErrorCode =
   | 'COMBAT_ALREADY_ACTIVE'
   | 'COMBAT_NOT_FOUND'
   | 'COMBAT_ALREADY_FINISHED'
-  | 'COMBAT_STATE_INVALID';
+  | 'COMBAT_STATE_INVALID'
+  | 'COMBAT_NO_POTIONS_REMAINING';
 
 export class CombatDomainError extends HttpException {
   constructor(
@@ -84,4 +85,12 @@ export function combatStateInvalid(): CombatDomainError {
   );
 }
 
+export function combatNoPotionsRemaining(): CombatDomainError {
+  return new CombatDomainError(
+    'COMBAT_NO_POTIONS_REMAINING',
+    HttpStatus.CONFLICT,
+    'No potions remain in this combat.',
+  );
+}
+
 export { characterNotFound } from '../travel/travel.errors';