Panoptic Mirror 136 (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 - $51.70
LP - $41.40
MP - $31.10
HP - $20.70
DMG - $10.40