In this challenge, you can only use one copy of each card to build 3 decks of the same class. If you use this copy in a deck, you cannot use it in another deck. The format is conquest, so you have to beat the opponent once with each one of the three decks you make.
The format of this event is Conquest: in order to win, you have to beat your opponent once with EACH ONE of your decks. Therefore, after each game, the winner MUST pick another one of their decks, the loser can keep the same deck or pick another one of their decks.
When a card is duplicate or multiple across different decks and/or within the same deck, all of its copies will be replaced with copies of a card from the list below. Cards on the list will be used as replacements in the order they are listed. Cards on the list that already exist in one of the decks will be skipped. The order of the duplicate cards replacements will be random.
The same card list will be used to complete incomplete decks. If a player has 3 decks of different classes, they are disqualified. If a player has 2 decks of one class, the third deck is the deck created from all penalty cards.