Darksteel

Panoptic Mirror

Imprint {X}, {T}: You may remove an instant or sorcery card with converted mana cost X in your hand from the game. (That card is imprinted on this artifact.)
At the beginning of your upkeep, you may copy an imprinted instant or sorcery card and play the copy without paying its mana cost.

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 Panoptic Mirror. If you do, you may cast the copy without paying its mana cost.