Mammoth Mantodea

Devour 1 (As this enters the battlefield, you may sacrifice any number of creatures. This creature enters the battlefield with that many +1/+1 counters on it.)
{r}{g}: Mammoth Mantodea gains flying until end of turn.
When Mammoth Mantodea loses flying, you may sacrifice a creature. If you do, put a +1/+1 counter on Mammoth Mantodea.