Reaper, Bane of Overwatch

+2: Turn Reaper,Bane of Overwatch into a 3/3 Human Warrior with reach and deathtouch. Prevent all damage to him this turn. He is still a Planeswalker
-5: Destroy three target creatures.
-8: Destroy all other Planeswalkers that have"Overwatch" in their name on the battlefield.