Glistening Sphere is a rare Artifact card from Phyrexia: All Will Be One Commander (ONC), collector number 20. Current market price: $14.09, TCGplayer market prices via Scryfall.
This artifact enters tapped. When this artifact enters, proliferate. {T}: Add one mana of any color. Corrupted — {T}: Add three mana of any one color. Activate only if an opponent has three or more poison counters.