When an opponent's monster declares an attack: Special Summon 1 Illusion monster from your hand or GY, and if you do, return the attacking monster to the hand. If a face-up Illusion monster(s) you control leaves the field by an opponent's card effect, while this card is in your GY (except during the Damage Step): You can banish this card; Special Summon 1 Illusion monster from your hand or GY. You can only use this effect of "Mirage Mirror Force" once per turn.