Areki, the Irregular

+1: Put a -1/-1 counter on target creature. If that creature dies this turn, you draw a card and lose 1 life.
-2: Put two -2/-2 counters on target creature. If it's an Ancient or Elder creature, destroy it instead.
-5: Distribute 7 -1/-1 counters among any number of creatures. For every two -1/-1 counters put on an Ancient or Elder creature this way, destroy it.