Solitary Cell is a rare Artifact card from Reality Fracture (FRA), collector number 149. Current market price: $0.23 (foil $0.32), TCGplayer market prices via Scryfall.
When this artifact enters, exile target nonland permanent an opponent controls with mana value 3 or less until this artifact leaves the battlefield. {1}, {T}, Discard a legendary card: Draw a card.