One Piece: Invincible from Impel Down

Marines or pirates. Wayne started out as a guard at Impel Down. He planned to keep lying low there indefinitely, maybe taking a few days off and hiding when Straw Hat arrived a few years later. But the appearance of his Death Mark talent changed his mind. [Death Mark: Kill a living creature and randomly plunder one of its abilities, including but not limited to Devil Fruit powers, swordsmanship, martial arts, innate biological talents, and unique skills.] After successfully gaining an ability, Wayne’s plans changed. From then on, a brazen madman appeared on the seas, caring nothing for either the Marines or the pirates. The most chaotic era began ahead of schedule.