If you don't cast the copy, it ceases to exist the next time state-based actions are checked
The following sheets are known to exist as shifted foils: Mercadian Masques Common (V&H), Urza's Destiny Common (V), Urza's Destiny Rare (V), German Mercadian Masques Common (V), German Scourge Common (H), Judge Promo Thran Quarry (H), Judge Promo Gaea's Cradle (V), Urza's Legacy Uncommon (V), Urza's Legacy Common (V), Judge Promo Stroke of Genius (V), Mercadian Masques Rare, Japanese Urzas Legacy Rare, and Japanese Urzas Destiny Rare
However, if the judge foil reprint does not happen, congratulations, you have just bought a piece of Magic history that could very well have no ceiling in the long-run
This is one that I see having a bigger impact in 60 card formats
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