Madara Uchiha (episode)

is episode 322 of the Naruto: Shippūden anime.

Summary
Kabuto takes control over Mū's body and explains to Madara that he has made him stronger than even his prime. With that, Madara pushes forward and takes down a large portion of the Fourth Division, while awakening his Susanoo. However, when Gaara, Ōnoki and Naruto attempt to take Madara down using various techniques, he activates his Rinnegan, confirming Kabuto's hypothesis that Madara didn't die at the Valley of the End and awakened the Rinnegan before his death. Madara drops a meteorite on the Fourth Division, but while Ōnoki stops the first, he is unable to stop the second meteorite hidden in the clouds. Madara then attempts to summon the Nine-Tails but fails because it is still sealed within Naruto. He then proceeds to testing Hashirama's cells inside of him by using the Wood Release Secret Technique: Nativity of a World of Trees, leaving Naruto and the other surviving shinobi of the Fourth Division in shock.

Trivia

 * When Naruto attacks Madara with his Sage Art: Ultra-Big Ball Rasengan, Madara already has his Rinnegan activated for a second, but then switches to his Mangekyō Sharingan. This is most likely an animation error.