Lord of the Forsaken is a mythic Creature — Demon card from Innistrad: Midnight Hunt (MID), collector number 346. Current market price: $1.16 (foil $1.42), TCGplayer market prices via Scryfall.
Flying, trample {B}, Sacrifice another creature: Target player mills three cards. Pay 1 life: Add {C}. Spend this mana only to cast a spell from your graveyard.