Panoptic Mirror 136/165 (Darksteel)

Imprint — {X}, {T}: You may exile an instant or sorcery card with mana value X from your hand. At the beginning of your upkeep, you may copy a card exiled with this artifact. If you do, you may cast the copy without paying its mana cost.

NM - $46.30
LP - $37.00
MP - $27.80
HP - $18.50
DMG - $9.30