Heltrui, Earth Reformed

+2: Search your library for a basic land card, put it one the battlefield taped. Create a 0/1 planet token.
-3: Create a 4/4 green Elemental creature, all plants you control get +1/+1.
-13: Destroy all lands that cannot tap for green, create X number of 4/4 green elemental where X is the number of lands destroyed this way.