Everyone's a Pirate, but I Choose to Crash the Party with Purnell

Lu Yuan transmigrates to Blue Star, a parallel world, where everyone can choose one of three character attribute panels from One Piece. When his turn comes, he discovers that one of the options is a bizarre interloper: an octopus onion. While everyone else sneers at the onion, Lu Yuan alone knows it is actually the universe's top-tier being, Puni. Just as everyone expects Lu Yuan to choose one of the other two SSS-tier character panels, he instead picks the onion everyone looks down on. In an instant, he falls from being the most dazzling prodigy to a useless rich kid. Even his personal secretary, who used to be devoted to him, distances herself from him. But only Lu Yuan knows just how much potential he truly has. The Seven Seals, Void, Element, Energy, Life, Eternity, and Reincarnation, will also be fully unlocked one by one. From then on, he defies the heavens, commands life and death and controls reincarnation, becoming the one and only true god of the universe. No swallowing his pride, no lying low. If there's a problem, he handles it head-on.