The Yu-Gi-Oh TCG Battles of Legend Glorious Gallery Sealed CASE contains 12 Booster Boxes manufactured by Konami. These boxes feature cards from the Glorious Gallery set in English language. Each booster is sealed and contains cards for the popular Yu-Gi-Oh! trading card game. This product is a must-have for collectors and players looking to expand their card collection with exclusive cards from the Glorious Gallery set.