Number 16: Shock Master (Platinum Secret Rare) #RA04-EN166

LightMonster

3 Level 4 monsters Once per turn: You can detach 1 Xyz Material from this card to declare 1 card type (Monster, Spell, or Trap); that type of card (if Spell or Trap) cannot be activated, or (if Monster) cannot activate its effects, until the end of your opponent's next turn.