Guarding Impel Down for Ten Years, I Crush the Four Emperors at Marineford!

In the year 1510 of the Sea Circle Calendar, Jiang Cheng transmigrated into the world of One Piece and became a lowly prison guard at Impel Down, under the World Government.

In this age of devils and marauding pirates, Jiang Cheng trembled in fear as an ordinary man.

Luckily, the Sin Prison System changed his life.

"** Ironfist Raze, reward obtained: Armament Haki!"

"** Whitebeard II, reward obtained: Observation Haki!"

"** Donquixote Doflamingo, reward obtained: Conqueror's Haki!"

In the year 1520 of the Sea Circle Calendar, the Paramount War began, and Impel Down descended into chaos!

Jiang Cheng, ** after Impel Down, arrived at Marineford. In full view of everyone, he crushed the Four Emperors, displayed unrivaled power, and brought the Great Pirate Era to an end!

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