Yu-Gi-Oh! Breakers of Shadow Special Edition - Rules of Play says:
Each box of Breakers of Shadow Special Edition comes with 3 booster packs of Breakers of Shadow, 1 of 2 Super Rare Cards from the Spring 2016 booster PLUS 1 of 2 Super Rare Cards – either Beast-Eyes Pendulum Dragon or Number 23: Lancelot, Dark Knight of the Underworld!
Each box of Breakers of Shadow Special Edition comes with 3 booster packs of Breakers of Shadow, 1 of 2 Super Rare Cards from the Spring 2016 booster PLUS 1 of 2 Super Rare Cards – either Beast-Eyes Pendulum Dragon or Number 23: Lancelot, Dark Knight of the Underworld!