The Flickering Mage
Identity — Guardian (U)
Undercover (Unveil only if another identity has been unveiled or if another player attacked the Leader this game.)
Unveil {4} (Start the game with this identity face down in the command zone. Turn it face up any time for its unveil cost.)
When The Flickering Mage is unveiled, exile up to four target nonland permanents. Return those cards to the battlefield tapped under their owner’s control at the beginning of the next end step.