The world of One Piece is known for individuals with extraordinary power spread across powerful organizations. From the Four Emperors ruling the seas, the Revolutionary Army leaders like Dragon, to the World Government’s strongest force, the Marine Admirals. The Admirals’ strength is unquestionable, they are the frontline face of the World Government and are always portrayed as incredibly powerful figures.
However, in the recent One Piece chapter 1154, creator Eiichiro Oda thrilled fans by finally introducing a character strong enough to kill a Marine Admiral. This marks a major milestone that changes the perception of power limits within the One Piece universe.
Rocks D. Xebec Visited Reverie 56 Years Ago

The flashback involving Loki of Elbaf opened a fascinating window into Rocks D. Xebec, a character Loki still idolizes to this day. As expected, Oda shed more light on Rocks’ mysterious life, revealing that he was not always the infamous legend he is known as now.
At one point, 56 years ago, Rocks arrived at Reverie, the World Government’s most important event. This shocked fans for two main reasons. First, Rocks may have invaded Reverie alone, an almost impossible feat for anyone. Second, Rocks might have once been a king, which fits with his ambition to become the “King of the World.”
Rocks D. Xebec Killed a Marine Admiral

During this visit to Reverie, a shocking event occurred: Rocks D. Xebec fought and killed a Marine Admiral. Remarkably, at that time, Rocks had not yet reached his peak power and had not even formed his own pirate crew. He single-handedly defeated a Marine Admiral, an unprecedented achievement in One Piece history.
Even more unbelievable, Rocks entered Marijoa without facing any worthy opponents. This feat not only earned him his first bounty but also drew massive attention, laying a solid foundation for his legendary status later on.
Rocks Was Not at His Peak When He Killed the Admiral
It is crucial to emphasize that when Rocks D. Xebec killed the Marine Admiral, he was not yet at his peak. The Rocks Pirates, which included future legends like Whitebeard, Kaido, and Big Mom, had not been formed. At that time, Rocks was just an ordinary individual without the overwhelming power and reputation he would later gain.
That he could defeat an Admiral just to start building his name, and then grow even stronger, is truly incredible. This highlights why even the Pirate King Gol D. Roger could not defeat Rocks alone and had to team up with Garp.
Rocks D. Xebec remains one of the most terrifyingly powerful and influential figures in One Piece history, and Oda’s revelation only strengthens his legendary status.