Taste for Life

Enchant Wizard. Hexproof.
Enchanted creature is a black Vampire in addition to its other colors and types. Whenever a creature an opponent controls dies, put a +1/+1 counter on enchanted creature.
Sacrifice another creature: Enchanted creature gains +1/+1, lifelink, and indestructible until end of turn.
"Studying necromancy is to explore the balancing point between life and death." -Anlovain, Notes.