Chandra, Volcano Tamer

+1: Untap up to one Mountain and up to one red creature you control. If you untap both, search your library for a Mountain and put it in your hand.
-3: Sacrifice a Mountain. Chandra, Volcano Tamer deals 2 damage to target player and that player sacrifices two lands.
-7: You get an emblem with: "Whenever you tap a Mountain for mana, deal 1 damage to any target."