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While you're losing a card, you're gaining card quality and a bajillion extra mana

Considering the keyword was originally inspired by an 'Un' set, you might expect to see this kind of combo in Unfinity rather than The Brothers' War

Once players get a hang of building decks, they can even start building partial decks that can be swapped with cards in the main deck

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Whether you're looking to simply collect as many Pokmon cards as you can, or if you're hoping to stash some away to give your kids in a decade or two, there's such a huge variety that there's no right answer - but there are some that are more worth getting over others