Vish Kal, Blood Arbiter
{4}{W}{B}{B}
Legendary Creature -- Vampire
5/5
Flying, lifelink
Sacrifice a creature: Put X +1/+1 counters on ~this~, where X is the sacrificed creature's power.
Remove all +1/+1 counters from ~this~: Target creature gets -1/-1 until end of turn for each +1/+1 counter removed this way.