Daggerwood Troll

Trample
Whenever a creature with power 4 or greater enters the battlefield under your control, put a +1/+1 counter on Daggerwood Troll.
Whenever a Daggerwood Troll becomes the target of a spell or ability an opponent controls, you may sacrifice a forest. If you do, counter that spell or ability.
"Don't fire your bow, it'll only anger it, bounce off, and hit a tree instead"
—Loren to Galvath, last words