Isochron Scepter
Isochron Scepter
{2}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.
Again—mana! And tap it! And cast! Feel the burn—you're doing great!