Incarnation of chainsaws

+2: Pay any amount of mana. Destroy that many devils. Create a blood token for each creature that died this way.
0: Until end of turn, target planeswalker becomes a 5/5 Devil creature with deathtouch, firststrike and indestructible.
-6: You get an emblem with "Whenever you sacrifice a blood token, put a +1/+1 counter on each creature you control and you gain 2 life."