One Piece: Nobody knows Devil Fruits better than me

"Only with domineering power can one rise above all else." This is the famous saying of Kaido, the "King of Beasts," the gold-medal lecturer of the Grand Line, revered by countless people. But Roy doesn't agree. "Then let me ask you—if a Devil Fruit user could analyze and collect all Devil Fruit abilities without being affected by Seastone or seawater, could he reach the pinnacle of this sea with his Devil Fruit powers?" To prove his point, Roy began to act. ...Years later. On the Red Line, the Holy Land "Mary Geoise" was ablaze. And atop Pangaea Castle, the instigator stood in the sky. His white naval banner fluttered in the wind. "Are you going to make an enemy of the world?" Faced with the questions from the World Nobles, Roy simply grinned. "Haven't I already been making an enemy of the world?" He smiled. His followers stepped out from behind him. The leading figures among them caused a moment of silence. Everyone recognized them. They were all powerful figures who had suddenly risen to fame on the seas in recent years. Among them were assassins, revolutionaries, pirates, merchants, doctors... Without exception, they were all incredibly powerful ability users, and all belonged to the same organization. Legend had it that this organization had a mysterious leader, the most dangerous criminal on the seas. And now, the truth was self-evident. "You, you are..." the new generation legend of the Navy. The most dangerous criminal on the seas. From the very beginning, these two were the same person. His name was... Roy Amos.