Jokullinn, Animus Ghost

+1: put a +1/+1 counter on target creature, or put a -1/-1 counter on a target creature. Gain 1 life.
-1: Return target nonland permanent to its owner's hand. Gain 2 life.
-7: Destroy up to five target permanents. Gain life equal to the highest converted mana cost among the permanents destroyed this way.