The Weiss Schwarz Sword Art Online Alicization War of Underworld Booster Box is a collectible card game product manufactured by Bushiroad. This box contains booster packs featuring cards from the Sword Art Online -Alicization- set in English language. Each pack contains standard-sized cards that players can use to enhance their gameplay experience in the Weiss Schwarz game. Released in 2021, this product is perfect for fans of the Sword Art Online series looking to expand their collection with new and exciting cards to enhance their gameplay.