"Brothers, Fight Together!!" (兄弟、共闘!!, Kyōdai, Kyōtō!!, Viz: Uchiha Brothers United Front) is chapter 579 of the original Naruto manga.
Closing his hood and stating that he was an introverted person and as such it was unsettling to be stared at by so many people, Kabuto sends his snakes charging towards Sasuke and Itachi. The brothers are able to fend this attack off, however Kabuto uses this opportunity to hide in one of his snakes. Here, Kabuto reveals the abilities that he had gained from experimenting with Sasuke's former teammates: Karin's healing abilities (which derive from her being an Uzumaki), a similar ability to Suigetsu's Hydrification Technique as well as Jūgo's ability to absorb the forces of nature. After revealing that he had found and trained at the Ryūchi Cave — much to Itachi's shock — he narrowly dodges Sasuke's attack. Emerging from the snake's mouth he reveals that he had finally surpassed Orochimaru and was able to become a sage and declares that he was now a dragon after Sasuke calls him an imperfect snake like Orochimaru.