One Piece Card Game: The Time of Battle [OP-16] Japanese Booster Box is based on the legendary Marineford War Arc, one of the most pivotal storylines in One Piece. The set features characters, battles, and key moments from the Paramount War, introducing new cards and support for a range of established archetypes. Designed for both players and collectors, OP-16 expands the One Piece Card Game with new strategies, sought-after collectibles, and artwork inspired by one of the series' most iconic conflicts.