Superheavy Samurai Soulbang Cannon

You can target 1 "Superheavy Samurai" monster you control; equip this monster from your hand or your side of the field to that target. It gains 1000 DEF. During either player's Battle Phase, when your opponent activates a card effect while you control a Defense Position "Superheavy Samurai" monster: You can banish this card from your Graveyard; negate the activation, and if you do, destroy it, then destroy as many monsters on the field as possible (min.1), and if you do, both players take 1000 damage.