Yuri the Earthshaper

0: Yuri the Earthshaper gains one loyalty counter for each color of mana your lands could produce.
-4: Yuri the Earthshaper deals X damage divided between up to X target creatures, where X is the number of colors lands you control could produce.
-12: You get an emblem with: "Whenever you tap a land for mana, you may have it deal 1 damage to any target."