Yugioh Hidden Arsenal 7 Booster box 24 packs factory sealed! when Hidden Arsenal 7: Knight of Stars marches into battle. Setting the stage for Hidden Arsenal's climatic final battle between light and darkness, Knight of Stars features an extremely powerful 70-card all-foil set, the most potent Hidden Arsenal set to date. Gem-Knights, Gishki, Gusto and Laval Monsters gives Duelists some extra battling power for the upcoming Tournament season