Haku, River Spirit

+1: Tap target creature an opponent controls. It doesn't untap on its controller's next untap step.
-1: Exile target nonland permanent you control. Return that card to the battlefield under its owner's control at the beginning of the next end step.
-4: Return all creatures to their owner's hands. Haku becomes a 3/3 white Human Spirit with haste until end of turn.