The Birth of the Legend - The Adventures of the Revolutionary Warrior Sabo!

On a Carta hilltop, Kyros shelters the battered crew along with Kanjuro, Kin'emon, Bellamy, and a recovering Law. Zoro stiffens as the door opens, but the arrival is Sabo, who tosses him a drink. Robin gladly introduces him as Luffy's brother, which startles Franky and Zoro. Sabo warns that CP0 draws near and everyone should move on, then begins the past he shares with Luffy and the late Ace, noting he was believed dead for years after an accident.

A dozen years back, a ten-year-old Sabo learned of Goa Kingdom's scheme to burn Gray Terminal and was beaten bloody while trying to warn Ace and Luffy. Dragon, who had spoken with the boy, later pulled him from the waves after the World Noble Jalmack shattered his little boat with a bazooka. Waking aboard a Revolutionary Army vessel with no recollection of even his name, Sabo refused to be sent home, uneasy about a family he could not remember.

Sabo openly identifies himself as Luffy's brother to the waking crew and reveals CP0's pursuit. The Dressrosa palace starts repairs as the colosseum fighters take shelter, and Bartolomeo binds the sleeping Cavendish in chains to keep Hakuba contained. Through flashback, Sabo trains relentlessly under Hack on Baltigo, spars with Bartholomew Kuma, and pulls a metal pipe from a weapons heap to vault off him and strike at Dragon.

Later, sheathing his arm in Armament Haki, Sabo shatters a fortress door and razes the structure with Ryusoken, the name Ace surfacing repeatedly in his clouded mind. Asked by Franky how his memory came back, he tightens up and admits that Ace's death is what reawakened it.

Though mostly filler, this Dressrosa Arc entry had Eiichiro Oda collaborating with the studio on its script. Nico Robin is the eyecatcher, and it rates 9.0. Among the additions are scenes echoing Episode 504, Sabo drawing his signature pipe from a weapons pile (a detail not made canon until Chapter 1098), and an early look at Dragon's fighting skill the manga had yet to display. One flashback shows the trio of Sabo, Koala, and Hack concealed from CP0 as they spread the false report about Doflamingo to the Dressrosa public.