If a card becomes damaged during a tournament in such a way that results in the card
becoming marked, a judge may create a proxy of that card to act as the damaged card in all
ways for the remainder of the tournament. The damaged card must be retained to use as a
reference when the proxy card is played. Alternately, if the player has another copy of that
card that is available for use, the player can simply replace the damaged card with an
undamaged copy.
In some cases, a card is damaged due to a production error. Players should do their best to
avoid playing with these cards, though sometimes that is not possible. If the judge feels that
this creates a marked-card situation, the judge may create a proxy card to act as the
damaged card in all ways for the remainder of the tournament. The damaged card must be
retained to use as a reference when the proxy card is played.