Don Gorge, Unyielding Hunger

Haste, Lifelink

Devour 2 (As this creature enters the battlefield, you may sacrifice any number of non-token creatures. This creature enters the battlefield with twice that many +1/+1 counters on it)
Don Gorge, Unyielding Hunger enters the battlefield tapped.
{10}: This creature becomes a Nightmare Beast. Put four +1/+1 counters on it and you draw a card. Activate only once.