The One Piece TCG OP-12 booster box, titled "Legacy of the Master," features cards highlighting the bonds between mentors and disciples, with characters like Zoro, Mihawk, Luffy, and Rayleigh. Each booster box contains 24 packs, and each pack includes 6 cards. The set introduces new leaders with innovative abilities and strategies, focusing on the "Bonds of Master and Disciple" theme.