1x background card containing a deck list of the Beastbound Assault cards
You'll need a Warhammer Underworlds warband, including their fighter cards, to use the contents of this deck.
The Rivals format is designed to be the most accessible way to play Warhammer Underworlds, as players face off using pre-made decks in a test of skill. Rules for all formats can be found on the Warhammer Community website.