Even within Universes Beyond, the product isnt guaranteed, and there's no reason they can't be used for future in-universes sets, either
(To scry 3, look at the top three cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.) You might also be interested in these products
While Homelands was turned into persona-non-grata by Wizards for decades, the relatively recent multiverse crossover where the Phyrexians attack all the planes have Grandmother Sengir represent Ulgrotha
Collectors often buy up cards illustrated by Kanda, anticipating that the value of cards drawn in their signature style will only increase with time
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Artificer Class Our top-scoring card is the only card printed in its set with the Class subtype