Death-Priest of Myrkul is a uncommon Creature — Tiefling Cleric card from Adventures in the Forgotten Realms (AFR), collector number 95. Current market price: $0.25 (foil $0.40), TCGplayer market prices via Scryfall.
Skeletons, Vampires, and Zombies you control get +1/+1. At the beginning of your end step, if a creature died this turn, you may pay {1}. If you do, create a 1/1 black Skeleton creature token.