One Piece: Lord of Calamity

Many years later, facing the calamities sweeping across the world, people couldn't help but recall the day the Rocks Pirates collapsed. At that time, everyone thought the world would return to order, but it wasn't until much later that people realized a true monster had begun devouring the world from that very day. Roya, who transmigrated to the One Piece world, unexpectedly obtained the ability to incarnate as Qiongqi. Qiongqi is a ferocious beast accompanied by natural disasters, so he can create natural disasters; Qiongqi is an evil beast that punishes good and promotes evil, so he can manipulate man-made calamities. Thus, this world welcomed true calamity. "Sorry, I'm not here to bring peace to the world. I only make the world wage war." So said Roya. Everything begins from the intern of the Rocks Pirates.