Draupnir, Duplicating Ring

Imprint — exile an artifice spell from
your hand or graveyard.

{3}, {t}: Imprint — exile an artifice spell from
your hand or graveyard.

{x}, {t}: Cast a copy of a card exiled by Draupnir, Duplicating Ring card without paying its mana cost.
X is equal to the exiled card's converted mana cost.