Skirsdag High Priest is a rare Creature — Human Cleric card from Innistrad (ISD), collector number 117. Current market price: $0.25 (foil $0.46), TCGplayer market prices via Scryfall.
Morbid — {T}, Tap two untapped creatures you control: Create a 5/5 black Demon creature token with flying. Activate only if a creature died this turn.