Ilhu, Gelatinous Scourge

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.)
Whenever Ilhu, Gelatinous Scourge, leaves the battlefield, create X 1/1 green ooze creature tokens, where X was the number of +1/+1 counters on Ilhu.