Target 1 "Junk Warrior" you control; if it battles an opponent's monster this turn while you control it, apply these effects. • Your opponent cannot activate cards or effects until the end of the Damage Step. • If it attacks a Defense Position monster, inflict piercing battle damage to your opponent. • Double any battle damage your opponent takes. • It cannot be destroyed by battle. • Destroy the opponent's monster that battled it at the end of the Damage Step.