Chancellor of the Spires is a rare Creature — Phyrexian Sphinx card from New Phyrexia (NPH), collector number 31. Current market price: $0.64 (foil $5.28), TCGplayer market prices via Scryfall.
You may reveal this card from your opening hand. If you do, at the beginning of the first upkeep, each opponent mills seven cards. Flying When this creature enters, you may cast target instant or sorcery card from an opponent's graveyard without paying its mana cost.