■ Whenever an opponent 's creature attacks , you may turn 3 face up cards in your shield zone face down. If you do, cast this spell for no cost .

■ Tap all your opponent 's creatures . They don't untap at the start of your next opponent 's turn .

■ After you cast this spell from your hand , put it on one of your shields face up instead of your graveyard . (The stack is still considered one shield .)