Alvira, the Demontic

+2: Put 2 -1/-1 counters on target creature. You gain 2 life.
-1: Destroy target non Vampire, non Zombie, non Skeleton creature with power 3 or less. Create a 1/1 black vampire creature token with lifelink.
-10: Put all other permanents into their owners graveyard. You gain life equal to the total toughness of those permanents.