Udvael, Reeker of Havoc

Flying, Trample, Protection from blue
Whenever a mountain enters the
battlefield under your control, put a +1/+1 counter on Udvael.
When Udvael, Reeker of Havoc dies, it deals
x damage to any target, where x is its power
As the second sun rose into place, it unleashed a multitude of creatures, led by 3 savage avatars.