Once you have collected all of the cards in a deck, you have mastered the deck. This means you cannot trade away any of these cards (except for doubles, of course) but you will receive some rewards for doing so.
|Card Deck Mastered||Rewards|
|Regular Deck||2 regular card(s) of choice, 3 random regular cards|
|Special Deck||2 regular card(s) of choice, 3 random regular cards|