■ Blocker (Whenever an opponent 's creature attacks , you may tap this creature to stop the attack . Then the 2 creatures battle .)

■ When you put this creature , choose one of your opponent 's creatures and tap it. At the start of your opponent 's next turn , that creature doesn't untap . Then you may turn a card in your mana zone face down . (A face down card in your mana zone is treated as a colorless card with a mana number of 1. Its owner may look at them at any time.)