One Piece: Lord of Calamity

Years later, faced with a calamity sweeping across the world, people could not help recalling the day the Rocks Pirates fell apart. Back then, everyone thought order would finally return to the world. Only much later did they realize that a true monster had begun devouring the world that very day.

After transmigrating into the world of One Piece, Roa unexpectedly gained the ability to transform into Qiongqi. As a savage beast that heralded natural disasters, Qiongqi granted him the power to unleash them. As an evil beast that punished virtue and rewarded wickedness, it also granted him control over man-made catastrophes.

And so, this world faced true calamity.

"Sorry, I'm not here to bring peace to the world. I'm only here to plunge it into war," Roa declared.

It all began with an apprentice aboard the Rocks Pirates' ship.