Yu-Gi-Oh! Breakers of Shadow Booster Box - Rules of Play says:
Swords will clash with the Breakers of Shadow booster set! Sharpen your blades and get ready to Duel with brand new Deck themes and the revival of a legend to the Yu-Gi-Oh! trading card game! Duelists can now look forward to getting at least 1 foil card in every booster pack!
Contains 24 Booster Packs!