Deep Forest Defender

Whenever you sacrifice a nonbasic land, you may
pay {g}{g}. If you do, return it to the battlefield
tapped under its owner's control with two +1/+1 counters on it. It becomes a 0/0 Elemental
creature. It's still a land.
"There are tales of druids summoning spirits to let the
forest defend itself, when all of the druids went away.
I'm sure it's just lore, though. See, we've been in this forest, chopping down trees, and nothings attacked us!"
—Village Lumberjack, last words