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2 = Print separate cards with rarity symbols and no errors, distributed in Packs

While a deck like Eldrazi Tron, for example, still uses Leyline of the Void to knock out graveyard decks in the sideboarded games, having access to something that Karn can find in Game 1 gives you the ability to deal with the graveyard in any stage of the match

The new change they imposed allowed players to have a legendary permanent in play even if an opponent controls the same card

You could also occasionally lean on Kaldring, the Rimestaff for some recursion, though this is secondary at best, and not usually the reason you're running Jorn