Kiren Fae

0: Exile Kiren Fae and one target creature. Return those cards to the battlefield under their owner's control at the beginning of your next upkeep.
-4: The next spell you cast this turn has: Copy this spell. You may choose new targets for the copy.
-X: Return target instant or sorcery from the graveyard to your hand. Kiren Fae loses X loyalty, where X was that spells CMC.