Buttering Wurm

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.)
Trample. If a creature was sacrificed this turn, Buttering Wurm has haste.
Living in Butterwood Forests, this mid-sized wurm
may be the most inaccurately named creature that was ever happened upon.