The Strongest DNF System, Starting in the World of One Piece

He obtains the strongest DNF System and transmigrates into One Piece.

The One Piece world's Xu Zu warriors: the Martial Emperor, Mind Emperor, Sword Emperor, and Dark Emperor. Their fists shatter the sky, and a single thought makes them emperors! Stars gleam upon their blades, and the Eclipse Dark Lord appears!

The Demon Realm's Overlord, the Immortal King of the Undead: the Demon Emperor, the Blood Prison Lord. "Kneel! Give me your lives and your blood! I am your one true ruler!"

The Ghostblade's Sword God from Sword Art Online: "The realm of swordsmanship has no limits. But what could the next realm possibly be?"

The Dark Elves' Shiranui from Naruto: "Fire is the eternal faith of ninjas, but their fire is nothing like ordinary flames. Only those who truly stand at the pinnacle of the ninja world are worthy of wielding the flame of the Bi Fang!"

The Celestial world's ??? To be continued: popular classics, crossover series...

"The Devil Fruit you are dismantling is highly valuable. Continue?"

Ding! Dismantling successful: obtained Devil Spirit...

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