Out-of-Play Zones
Cards not currently in play exist in one of several out-of-play zones. Out-of-play cards can be hidden from one or both players depending on which out-of-play zone they occupy:
Archives: A player may look at the cards in their archives at any time. A player cannot look at the cards in their opponent’s archives.
Deck: Cards in a deck cannot be viewed by either player during a game.
Discard Pile: Cards in discard piles are faceup and may be viewed by either player at any time. The order of the cards in the discard pile must be maintained.
Hand: A player can view the cards in their hand at any time, but they cannot view the cards in their opponent’s hand.
Purged: Purged cards are kept faceup and may be viewed by either player at any time.
Card abilities may create additional out-of-play zones. Unless otherwise specified, if a card ability instructs that a card be placed “facedown,” it can only be viewed by the player who controls the card. This also applies to cards that are placed facedown under other cards; they can only be viewed by the controller of the card that the facedown card is under.
If a card that creates an out-of-play zone leaves play, any pending effects from the card leaving play are resolved, then any cards that would remain in that zone are put in their owner's discard pile.
Related Topic: In-Play Zone