Karador, Ghost Chieftain is a mythic Legendary Creature — Centaur Spirit card from Secret Lair Drop (SLD), collector number 1646. Current market price: $2.02, TCGplayer market prices via Scryfall.
This spell costs {1} less to cast for each creature card in your graveyard. Once during each of your turns, you may cast a creature spell from your graveyard.