Isochron Scepter is a uncommon Artifact card from Mirrodin (MRD), collector number 188. Current market price: $15.83 (foil $52.12), TCGplayer market prices via Scryfall.
Imprint — When this artifact enters, you may exile an instant card with mana value 2 or less from your hand. {2}, {T}: You may copy the exiled card. If you do, you may cast the copy without paying its mana cost.