You can Special Summon this card (from your hand) by returning 1 "U.A." monster you control to the hand, except "U.A. Dreadnought Dunker". You can only Special Summon "U.A. Dreadnought Dunker" once per turn this way. If this card attacks a Defense Position monster, inflict piercing battle damage to your opponent. When this card inflicts battle damage to your opponent: You can target 1 card on the field; destroy it.