Cronox, Greatjaw Sovereign

Devour 3, menace, prowess, trample
Supremacy 5 (When you cast this creature you may pay an additional {5}, if you do, this creature enters the battlefield with four +1/+1 counters on it.)
Whenever another creature dies, you may put X +1/+1 counters on Cronox, Greatjaw Sovereign, where X is that creature's power.
There is always a greater predator.