| card_type = Spell
| property = Quick-Play
| effect_types = Activation requirement, Effect
| lore = [[Activate]] only when your opponent activates an [[Effect Monster]]'s [[effect]]. [[Negate]] the activation, and [[destroy]] that [[Monster Card|monster]].
| appears_in_gx = 177
| m/s/t = Negates the activation of your opponent's Effect Monster's effect
| action = Destroys your opponent's Monster Cards
}}
{{Unofficial names
| de_name = Effekt geschlossen
| hr_name = Zatvor Efekta
| el_name = Κλείσιμο Επίδρασης
}}