Rule · Chapter 1
cr:1.3.3
A permanent is a card in the arena that remains there indefinitely, or until they are destroyed, banished, or otherwise removed by an effect or game rule. Hero-cards, arena-cards, and token-cards are permanents while they are in the arena. Deck-cards become permanents when they are put into the arena (but not the combat chain) and they have one of the following subtypes: Affliction, Ally, Ash, Aura, Construct, Figment, Invocation, Item, and Landmark.[2.10]