703.4. Deck Presentation Error [Warning]: A player’s deck’s contents are illegal during presentation to an opponent or during gameplay.
703.4.a. Examples:
703.4.a.1. A player deck does not match their registered decklist.
703.4.a.2. A player submits a battlefield they have already used in the match.
703.4.a.3. A player forgets to restore their deck to a pre-sideboard state for the first game of a match.
703.4.a.4. A player forgets to take their chosen champion from their main deck and place it in the chosen champion zone.
703.4.a.5. A player’s deck is the incorrect deck size. See 402 for more information about deck size. (Example: A player misplaced a card or forgot to shuffle their banished cards back into their deck between games)
703.4.b. Remedies:
703.4.b.1. If the error is caught by any player before opening hands have been drawn, restore the deck to its correct state if possible and instruct players to proceed.
703.4.b.2. If the error is caught by the erroring player after opening hands have been drawn and it is easily possible, restore the deck to its correct state and instruct players to proceed. For example:
703.4.b.3. If the error is caught by a player other than the erroring player after opening hands have been drawn, the penalty is upgraded to [Game Loss].
703.4.b.4. If restoring the deck to its correct state is not easily possible, the penalty is upgraded to [Game Loss].
703.4.b.5. If the cards required to correct the deck cannot be acquired in a timely manner, the head judge can issue a proxy.