"The Abyss" (4)
At the beginning of each player's upkeep, destroy target nonartifact creature that player controls of their choice. It can't be regenerated.
Target player draws cards equal to half the number of cards in their library and loses half their life. Round up each time.
Flying
Morbid — At the beginning of each end step, if a creature died this turn, destroy target non-Demon creature.
Gatherer works better in the Companion app!