Liliana's Devotee is a uncommon Creature — Human Warlock card from Midnight Hunt Commander (MIC), collector number 122. Current market price: $0.29, TCGplayer market prices via Scryfall.
Zombies you control get +1/+0. At the beginning of your end step, if a creature died this turn, you may pay {1}{B}. If you do, create a 2/2 black Zombie creature token.