Guff Rewrites History is a rare Instant card from Commander Masters (CMM), collector number 767. Current market price: $3.68 (foil $5.73), TCGplayer market prices via Scryfall.
For each player, choose target nonenchantment, nonland permanent that player controls. Those permanents' owners shuffle them into their libraries. Each player who controlled one of those permanents exiles cards from the top of their library until they exile a nonland card, then puts the rest on the bottom of their library in a random order. Each player may cast the nonland card they exiled without paying its mana cost.