Elenda, the Bloodcrazed

Flying, lifelink, haste
Whenever Elenda, the Bloodcrazed deals combat damage to a player, each opponent sacrifices a creature. You create a 2/1 black Specter creature token for each creature that dies this way.
After undergoing the Blood Fast herself for months on end, to prove herself to her stubborn and corrupt superiors, Elenda had finally given in to her hunger. Her first victims were the very same brothers and sisters who pushed her far beyond her limits.