"Madara Uchiha is Back" (うちはマダラ、参る, Uchiha Madara, Mairu) is chapter 657 of the original Naruto manga.
Giving their opponent no time to relent, Sasuke engulfs Madara in the flames of Amaterasu. Madara removes his armour, as Naruto insists that is was pointless to simply attack Madara, while Hashirama is puzzled as to why their opponent had closed his eyes. Emerging unscathed from the flames, Madara turns his attention to Hashirama, whom he reminds of the last conversation they had at the Naka Shrine, revealing that he believed that only the power of the Uchiha and Senju could bring true bliss. Launching his counterattack, Madara knocks both Naruto and Sai aside and uses the stakes he had embedded in Hashirama earlier to immobilise his target. Using this opportunity, Madara absorbs Hashirama's senjutsu chakra, which reflects on the face of Hashirama jutting out of his chest. Lamenting of the level of power which he was easily able to control, Madara is once again forced on the defensive, as he is attacked by Sasuke once more. Lauding the younger Uchiha for his Mangekyō Sharingan, Madara decides that Sasuke's dōjutsu would make a perfect substitute until his Rinnegan came back. Elsewhere, Black Zetsu notes that Obito would die soon after reviving Madara, and declares that he would now retrieve Madara's eye. Set upon by both Kakashi and Minato, Zetsu merges with Obito, and explains that he was the only thing keeping Obito alive at this point in time. Explaining how he had escaped from the Hokage Guard Platoon and bided his time, Zetsu exclaims that he was Madara's will and would go as far as to use Obito's body to defeat them. Staving off another attack from his opponents, Madara soon sets his unseeing gaze upon the tailed beasts, determined to hunt them down.