Elemental Harmony

Sacrifice a creature: Put a Harmony counter on target Forest, it becomes a 6/6 green Elemental creature with trample. It is still a land. If the counter is placed on a Forest an opponent controls, destroy it and put a 3/3 green Grove Attendant creature token on the battlefield under your control. Your opponent gains 3 life.
Peace with the land is its own kind of strength.