Boneshard Hellion

Devour 2 (As this enters the battlefield, you may sacrifice any number of creatures. This creature enters the battlefield with twice that many +1/+1 counters on it.)
At the beginning of your upkeep, create a 0/1 black Zombie Elemental creature token called Boneshard Elemental with "{1}, Sacrifice this Creature: Deal 1 damage to any target." for each +1/+1 counter on Boneshard Hellion.