Grave Dragon

Flying
Aberration (When combat damage is being assigned to this creature, instead put that many -1/-1 counter on it for each point of damage being dealt, then put that many Intestine tokens with 0/1, shroud and
"{p/b}, sacrifice this creature: Remove a -1/-1 counter of target creature you control.".)
Dark: Sacrifice 4 Intestine tokens you control, return Grave Dragon back to your hand.