Towering Force

Immerse {g}{g}{g} (Whenever Towering Force leaves the battlefield, you may pay {g}{g}{g}. If you do, put it on the bottom of your library instead.)
Whenever Towering Force enters or leaves the battlefield, put a 3/3 green elemental creature token onto the battlefield.
The Westwood have never been a force to fight, but the spirits and elements that reside within are no stranger to defending themselves.