Ashiok, Awakened Fear

0: Turn a card exiled with Ashiok face up. You may put that card into its owner's graveyard. If you do put three +1/+1 counters on target Nightmare.
-X: Create X plus 1 1/1 blue and black Nightmare creature token with flying and wither. X can be 0.
-3: You et an emblem with "Nightmare creatures you control have all abilities of face up creature cards exiled with Ashiok."