Abhorrent Overlord is a rare Creature — Demon card from Magic Online Promos (PRM), collector number 50126.
Flying When this creature enters, create a number of 1/1 black Harpy creature tokens with flying equal to your devotion to black. (Each {B} in the mana costs of permanents you control counts toward your devotion to black.) At the beginning of your upkeep, sacrifice a creature.