One Piece: Five-Clawed Yinglong, Building the Strongest Marines!

[Mythical Zoan: Azure Dragon form + supreme-grade great blade, Azure Dragon Halberd + Three Types of Haki]

My dear godfathers, the rating has only just come out, so it'll rise later. Trample Wano Country, kill Momonosuke, wipe out Koby! 6,000 words every day, with extra-long updates now and then!

Jarvis transmigrates to the world of the Pirate King. His older sister is Zephyr's wife. A year later, the World Government plots against them, and he nearly dies at Marine Headquarters.

Jarvis goes completely berserk. You killed my family, so I'll flip the table. Nobody gets to play anymore!

First, wipe out Wano Country, then find Pure Gold to extend the prime years of Sengoku, Zephyr, and Garp.

Give Zephyr the Qiongqi Fruit. With his extreme physical prowess and terrifying strength, he can reach the pinnacle with Armament Haki too.

Give Garp the More-More Fruit and let the Celestial Dragons find out what ultimate power feels like: one punch straight through the Red Line.

Become the Black Dragon Admiral and take Ace as a disciple.

Teach's identity as the son of Rocks is exposed. The Marines declare that they'll execute him, and the New World's Three Emperors head for Marineford!

The Marines they face are the most terrifying force in centuries.

The Four Marine Admirals: Akainu, Kizaru, Aokiji, and Black Dragon.

Legendary Vice Admirals: Red Ghost Douglas Bullet, Thunder Dragon Ze Er, Blood Wolf Enel, and Fujitora Issho.

The new generation's three legends: Ace, Luffy, and Sabo.

The Marines' chief strategist, whose intelligence is demonic: Robin.

Nami, who fights using the weather.

Koby joins the fray too. “Mr. Luffy, I will stop your dream!”

Luffy rushes in and punches Koby to death. “What are you? Don't stand in the way of me becoming the strongest man in the Marines!”

The Paramount War ends, and Jarvis leads the Marines straight to Marineford!