Abyssal Hydra

Ingest {8}{b} (You may cast this spell by sacrificing a creature and paying the emerge cost reduced by that creature's converted mana cost.)
Devour 3 (As this enters the battlefield, you may sacrifice any number of creatures. This creature enters the battlefield with three times that many +1/+1 counters on it.)
The Abyss is most frightening when you can't see it staring back.