One Punch to Take Down the Four Emperors

Bai Ye accidentally transmigrates to the world of One Piece and awakens the Hero System, unlocking Sett's panel. By leveling up, Bai Ye gains all of Sett's skills.

As he levels up, Bai Ye discovers that he can also obtain the skills of other champions.

Turn their own methods against them: he fights Kizaru and steals the Glint-Glint Fruit, shattering the legend that each Devil Fruit power is unique and shocking the entire world.

With a thunderous roar, his size increases a hundredfold and wild lightning crackles around him. At the Battle of Marineford, he sweeps all opposition aside with invincible might.

Haymaker: his violent aura erupts like that of a descending demon god, and in Wano he tears apart Kaido's immortal body.

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.