Loraka Overseer

Mountains you control are indestructible as long as this is tapped. Tappity. (You do not have to untap this during your untap step.) {t}: add {r} or {w}. Whenever this untaps, this deals 1 damage to everything but this.
More (You may pay {r}{r}{r}{r}{r}{r} or pay {w}{w}{w}{w}{w}{w} instead of paying its mana cost. If you do, when this untaps, you gain 2 life and creatures you control get +0/+2.)