Discard Pile

From Archon Arcana - The KeyForge Wiki

When a card is destroyed or discarded, it is placed on top of its owner’s discard pile. The cards in each player’s discard pile are open information, and may be referenced at any time. The order of cards in a player’s discard pile is maintained during play, unless a card ability causes this order to change. When a player runs out of cards in their deck, they shuffle their discard pile to create a new deck.

Official rules v1.8 March 2021