Mihikora Nightwatch

+1: Prevent all combat damage done to target creature or plansewalker until next turn's end step.
-4: Target player reveals his or her hand. Exile target card. If you do, draw cards equal to its mana cost.
-6: Mihikora Nightwatch becomes a 6/6 with hexproof, indestructible, deathtouch, and lifelink until end of turn. It must be blocked by all creatures.