MTR 3.5 Substitute Cards

Official substitute cards are used to represent double-faced cards in sets that contain them. Only official substitute cards may be used to represent double-faced cards in a deck.

The name of the card that the substitute card is representing must be legible. Other modifications must follow the rules for modifying normal Magic cards.

The use of substitute cards is required if a player has double-faced cards in their deck and is not using completely opaque sleeves.

If a player uses a substitute card to represent a double-faced card in their deck, then all copies of that double-faced card in the deck must be represented by substitute cards, and any copies of that double-faced card in a hidden zone are considered to not exist for purposes of determining deck legality.

Each individual checklist card used must have one (and only one) of the items checked.

A substitute card is only used while the card it represents is in a hidden zone. The card represented by a helper card is not a playable Magic card until the substitute card has been placed in a public zone. Multiple substitutes cannot be used to represent a single copy of the actual card. For each substitute card used, the player must have a copy of the actual card available, though they are not considered sideboard cards and are not presented to their opponent.