The Two Mangekyō

is episode 415 of the Naruto: Shippūden anime.

Summary
Now that its master was nearby, Black Zetsu declared that nobody could stop it from handing Madara the left Rinnegan and the Nine-Tails' Yin half, detaching itself from Obito's body. As Kakashi and Gaara prepared to attack in order to give Naruto the meanings to survive the tailed beast's extraction, Black Zetsu found itself unable to leave Obito's body, due to him not allowing it to. Obito questioned Madara about who he himself was to the older Uchiha, with the jinchūriki explaining how Obito – as a follower of Madara's ideals – was Madara, he who wished to cancel the world created by the Sage of the Six Paths and to create a new one through the Eye of the Moon Plan's completion.

Seemingly giving in to Madara's words, Obito started walking toward his ancestor, with Minato trying to attack Madara as Kakashi and Gaara tried to stop Obito, only for Madara to effortlessly stop them. However, Obito didn't take Madara's hand, but instead pierced him in the gut, claiming that his current self was the same as the one who wanted to become Hokage – recalling Naruto's words in the process. Obito went on to extract fragments of the One-Tail's and the Eight-Tails' chakra, ordering Kakashi to teleport Naruto and Sakura to the other dimension. After Madara stopped Obito from going there himself, Kakashi ran to Obito's side, with his old comrade commenting on how Kakashi always looked down upon him, remembering the old times in Konohagakure.