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ONE PIECE: MARINEFORD'S GREATEST SCIENTIST

After transmigrating, Natsume finds himself in the body of an eight-year-old child. Shortly after awakening, he activates a technology system, granting him advanced knowledge far beyond the current level of the One Piece world. Assuming the identity of the younger brother of Kizaru, Natsume joins the Navy’s Technology Department. There, he begins his groundbreaking research, starting with Seraphim, advanced humanoid combat machines. With continuous upgrades, he develops the Admiral-class Seraphim, eventually achieving the pinnacle: Rocks Seraphim, autonomous war machines capable of rivaling even the strongest Yonko commanders. With these technological marvels, Natsume begins disrupting the balance of power at sea. The Seven Warlords, once pillars of strength, are no match for his creations. The Yonko—considered almost untouchable—face unprecedented threats as well. Among Natsume’s most ambitious projects is the Cosmic Fruit Tree, an entity surpassing the legendary Devil Fruit Tree. Its fruits grant abilities that combine powers reminiscent of the strongest Devil Fruits, Haki enhancements, and even unique technology-augmented effects, creating a whole new tier of combat potential. Natsume’s arsenal also includes: Iron Man Mechs—giant exosuits for frontline combat and heavy artillery Haki-enhancing Apples—fruits that temporarily boost Haki to extreme levels Kinetic Energy Drinks—enhancing strength, speed, and stamina Nuclear Pacifists—weapons designed for deterrence rather than destruction As a result, the entire pirate world spirals into chaos: Blackbeard: “You won’t believe it… but two low-tier Seraphim wiped out half my crew!” Doflamingo: “The age has changed. The new era belongs only to Natsume!” To counter Natsume’s technology, even the pirates begin to replicate his creations, triggering a technological arms race between the Navy and pirate crews: Four Emperors: “We spent every last coin trying to keep up!” Navy Officers: “You think we’re in any better shape?” Celestial Dragons: “You won’t believe it… but we’re broke too!” Natsume, ever the schemer, remarks wryly: “You begged me to develop these things, practically on your knees. Now that everyone’s broke, it’s my fault?”
ShiroTL · 795 Views

I Reincarnated in One Piece and Became The Strongest Logia Type

Others transmigrate into the world of One Piece blessed with a Prophet System—a cheat that guides every step. But Gern Reginald Sigmar arrives in a far crueler era: the Dark Ages of Rocks. The script? Long since shattered. A system? It never existed. The only path left to him is brutally simple—join the Navy and survive. After four grueling years of relentless struggle, he finally becomes a mere private, then even takes out a loan, risking everything to pull strings and force his way onto the battlefield of God Valley. Yet before they can even reach the central zone, he is crushed by overwhelming Haki again and again—his consciousness shattered no fewer than fifty times. When he opens his eyes for the final time, a mysterious fruit of unknown origin lies in his arms. Without hesitation, Gern makes his choice and bites into it. In that instant, space shatters. The atmosphere howls. His body transforms into the very source of devastation itself, and with a single motion, the air trembles as if the world were about to collapse. A Logia-type Devil Fruit—the Heaven-War Fruit! Gern stares in disbelief. “Huh? Aren’t these familiar effects supposed to belong to a Paramecia? How the hell is this classified as a Logia?!” From that moment on, Marine Headquarters gains something unprecedented—a humanoid natural disaster. And so, Gern declares his justice: “Get out of the way. I’m about to begin the execution of ‘Shaking’ justice!” In time, this becomes the creed of the man who will stand at the very peak as a Marshal: “If justice must rely on natural disasters to be reshaped… then let it begin today.” My justice is natural disaster.
Yoru_Sama_2190 · 1.1m Views