Target 1 face-up monster you control; equip this card to it as an Equip Card with this effect. ● Once per battle, during the Battle Step, if the equipped monster battles an opponent's monster: You can destroy that opponent's monster. If this card is destroyed: You can add 1 "Armament Reincarnation" from your Deck to your hand. You can only use this effect of "Mirror Barrier" once per turn.