Séance Board is a rare Artifact card from Duskmourn: House of Horror Commander (DSC), collector number 40. Current market price: $2.94, TCGplayer market prices via Scryfall.
Morbid — At the beginning of each end step, if a creature died this turn, put a soul counter on this artifact. {T}: Add X mana of any one color, where X is the number of soul counters on this artifact. Spend this mana only to cast instant, sorcery, Demon, and Spirit spells.