Scrap Fist

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