Uldanal, Venneglade Sovereign

Trample, Haste, protection from red and artifacts.
Ravage(All creatures able to block this creature do so.)
Devour 2(As this creature enters the battlefield, you may sacrifice any number of creatures. If you do, put 2 +1/+1 counters on this creature for each creature sacrificed this way.)
{w}{w}{g}{g}: Creatures you control get +X/+X and gain Vigilance until end of turn, where X is half the number of forests you control
rounding down.