Lord of the Forsaken is a mythic Creature — Demon card from Tarkir: Dragonstorm Commander (TDC), collector number 186. Current market price: $0.33, 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.