Veko, Death's Doorkeeper is a rare Legendary Creature — Spirit Cleric card from Alchemy: Murders at Karlov Manor (YMKM), collector number 30.
Extort {T}, Sacrifice a non-Spirit creature: Return target creature card from your graveyard to your hand. It perpetually becomes a Spirit, has base power and toughness 1/1, and gains "You may pay {W/B} rather than pay this spell's mana cost." Activate only as a sorcery.