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.