Face-down cards in exile should be kept in separate piles based on when they were exiled and how they were exiled. If a player is instructed to choose an exiled card, the player may choose a specific face-down card only if the player is allowed to look at that card. Otherwise, they may choose a pile of face-down exiled cards, and then a card is chosen at random from within that pile. If choosing such a card is part of casting a spell or activating an ability, the chosen card isn’t revealed until after that cost is fully paid. (See rule 601.2i.)
January 25, 2019 · Ravnica Allegiance
Face-down cards in exile should be kept in separate piles based on when they were exiled and how they were exiled. If a player is instructed to choose an exiled card, the player may choose a specific face-down card only if the player is allowed to look at that card. Otherwise, they may choose a pile of face-down exiled cards, and then a card is chosen at random from within that pile. If choosing such a card is part of casting a spell or activating an ability, the chosen card isn't revealed until after that cost is fully paid. (See rule 601.2i.)
April 27, 2018 · Dominaria
Face-down cards in exile should be kept in separate piles based on when they were exiled and how they were exiled. If a player is instructed to choose an exiled card, the player may choose a specific face-down card only if the player is allowed to look at that card. Otherwise, they may choose a pile of face-down exiled cards, and then a card is chosen at random from within that pile. If choosing such a card is part of casting a spell or activating an ability, the chosen card isn’t revealed until after that cost is fully paid. (See rule 601.2i.)
September 26, 2015 · Battle for Zendikar
Face-down cards in exile should be kept in separate piles based on when they were exiled and how they were exiled. If a player is instructed to choose an exiled card, the player may choose a specific face-down card only if the player is allowed to look at that card. Otherwise, he or she may choose a pile of face-down exiled cards, and then a card is chosen at random from within that pile. If choosing such a card is part of casting a spell or activating an ability, the chosen card isn’t revealed until after that cost is fully paid. (See rule 601.2i.)
September 30, 2011 · Innistrad
Exiled cards that might return to the battlefield or any other zone should be kept in separate piles to keep track of their respective ways of returning. Exiled cards that may have an impact on the game due to their own abilities (such as cards with haunt) or the abilities of the cards that exiled them should likewise be kept in separate piles.
June 17, 2011 · Commander 2011
Exiled cards that might return to the battlefield or any other zone should be kept in separate piles
February 4, 2011 · Mirrodin Besieged
Exiled cards that might return to the battlefield or any other zone should be kept in separate piles to keep track of their respective ways of returning. Exiled cards that may have an impact on the game due to their own abilities (such as cards with haunt) or the abilities of the cards that exiled them should likewise be kept in separate piles.
October 1, 2010 · Scars of Mirrodin
Exiled cards that might return to the battlefield or any other zone should be kept in separate piles
February 1, 2010 · Worldwake
Exiled cards that might return to the battlefield or any other zone should be kept in separate piles to keep track of their respective ways of returning. Exiled cards that may have an impact on the game due to their own abilities (such as cards with haunt) or the abilities of the cards that exiled them should likewise be kept in separate piles.