The Golden Throne is a rare Legendary Artifact card from Warhammer 40,000 Commander (40K), collector number 157. Current market price: $9.57, TCGplayer market prices via Scryfall.
Arcane Life-support — If you would lose the game, instead exile The Golden Throne and your life total becomes 1. A Thousand Souls Die Every Day — {T}, Sacrifice a creature: Add three mana in any combination of colors.