Professor Gilderoy Lockhart

Illusionist, Teacher
-When Professor Gilderoy Lockhart enters the battlefield you may have it become a copy of target creature in target opponent's library or graveyard.
-During your upkeep you must pay {x}, the mana value of the the creature being copied or sacrifice Professor Gilderoy Lockhart.
-If Professor Gilderoy Lockhart is sacrificed, target opponent who's creature was copied may choose to cast that creature to the battlefield, without payi