Help with functions of the pioneer 2.

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Well, I have found out ho to edit my deck, ythanks decswxaqz, but now I have another question. What is the card library, near the item shop sort of thing, used for? I mean, it has this certain function to put cards into it, but what are those cards then used for? or is it just a garbage can, or something?

Another question. Is it possible to deposit cards?

Whee! I got a nono dragon card yesterday! Too bad I cannot get online yet.