cr:4.5.1a

If a player loses a game, and the game does not end, all objects the player controls are cleared, and then all objects owned by the player are removed from the game. The player and their hero cease to exist for the remainder of the game. Layer-continuous effects controlled by the player continue to exist until they expire.

Example: A player controls an attack action card on the combat chain and a triggered-layer on the stack. An opponent controls a Frostbite (a token-card) and a Frost Hex (a deck-card) owned by the player. If the player loses the game at this point, the attack is cleared to their graveyard and the triggered-layer ceases to exist on the stack, and then everything the player owns (including the Frostbite and Frost Hex) are removed from the game.