diff --git a/src/battle_util.c b/src/battle_util.c
index e6137b0f2..e669bfa03 100644
--- a/src/battle_util.c
+++ b/src/battle_util.c
@@ -6120,7 +6120,20 @@ u8 ItemBattleEffects(u8 caseID, u8 battlerId, bool8 moveTurn)
                 break;
             case HOLD_EFFECT_BLACK_SLUDGE:
                 if (IS_BATTLER_OF_TYPE(battlerId, TYPE_POISON))
+                {
                     goto LEFTOVERS;
+                }
+                else if (GetBattlerAbility(battlerId) != ABILITY_MAGIC_GUARD && !moveTurn)
+                {
+                    gBattleMoveDamage = gBattleMons[battlerId].maxHP / 8;
+                    if (gBattleMoveDamage == 0)
+                        gBattleMoveDamage = 1;
+                    BattleScriptExecute(BattleScript_ItemHurtEnd2);
+                    effect = ITEM_HP_CHANGE;
+                    RecordItemEffectBattle(battlerId, battlerHoldEffect);
+                    PREPARE_ITEM_BUFFER(gBattleTextBuff1, gLastUsedItem);
+                }
+                break;
             case HOLD_EFFECT_LEFTOVERS:
             LEFTOVERS:
                 if (gBattleMons[battlerId].hp < gBattleMons[battlerId].maxHP && !moveTurn)