Tournament Rules › 602 › 602.4 › 602.4.aTournament rule 602.4.a.9 Preconstructed Decks in Sealed CompetitionsPreconstructed Decks in Sealed Competitions602.4.a.9.a Some competitions or portions of competitions provide preconstructed decks for players to use. These are considered…602.4.a.9.b Players must use exactly the decks provided, except as modified by any addenda to the competition.Official Tournament Rules