Marethyu, Undead

+2: Each opponent loses 2 life. You gain life equal to the amount lost this way.
0: Until end of turn, Marethyu, Undead becomes a 5/5 Skeleton Knight with Menace and First-Strike. Redirect all damage to its controller.
-8: Exile all non-Skeleton creatures. For each creature exiled this way, create a 2/2 Skeleton Knight with Lifelink and Deathtouch.