Each Build & Battle Box includes four Sword & Shield—Silver Tempest booster packs and a 40-card ready-to-play deck featuring key cards from current and prior sets, as well as one of four unique foil promo cards to boost your Prerelease deck. Depending on which promo card you get, you could add the powerfully bright Sunflora, red-hot Rapidash, elegant Kirlia, or ancient Archeops to your Prerelease deck and collection. Whichever promo you end up with will certainly shape your Prerelease strategy!