Each Build & Battle Box includes four Scarlet & Violet—Temporal Forces booster packs, 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 torrentially powerful Feraligatr, the Metal Energy-accelerating Metang, the prehistoric Koraidon, or the futuristic Miraidon. Whichever promo card you end up with, it will certainly shape your Prerelease strategy!