Mila, Erinye Pactmaster

+2: Until end of turn, Mila, Erinye Pactmaster, becomes a 5/5 Erinye Warlock creature with deathtouch and flying that's still a planeswalker.
-1: Put two -1/-1 counters on target creature. If the target dies this turn, you gain life equal to the number of counters.
-5: Destroy all creatures with counters on them. You gain life equal to the number of counters, and each of your opponents loses the same life.