Like most Magic: The Gathering cards, the value of Geralf's Masterpiece depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Shadows over Innistrad)
After a quick magiccards.info search I compiled the following list: IN force spike spell pierce spell snare mana leak memory lapse miscalculation remand 4 rune snag -- hooray counterspell complicate forbid glen elendra archmage cryptic command condescend force of will OTHERS disrupt -- nobody ever took it when i slotted it in, but it might be worth another try dissipate -- solid but unexciting, U has a million 3-CMC cards already dissolve -- so i'd rather run this over dissipate hinder -- and this just seems like a cooler dissipate, too
The aforementioned Gardevoir ex, Charizard ex, and Mew ex cards were among those cards
Personal Cube Level-Ups long term insistence of designers like Parker LaMascus to just double or triple up on cards you want your players to have, Magic players love rules and spreadsheets
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