Build two decks with a friend - and then play right away! This Pokemon TCG: Scarlet & Violet - Obsidian Flames Build & Battle Stadium contains a massive set of cards, including two Build & Battle Boxes. Each Build & Battle Box contains four booster packs and a 40-card deck that includes an exclusive foil card. You can play these decks right out of the box or enhance them with cards from the booster packs. Get ready to face your opponents in the Build & Battle Stadium!