Isochron Scepter is a mythic Artifact card from From the Vault: Relics (V10), collector number 3. Current market price: — (foil $29.31), 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.