Power - Episode Final

is episode 295 of the Naruto: Shippūden anime.

Summary
Absorbing the power within the Ama no Hoko, the Nine-Tailed Naruto Clone mutated into a hydra-tailed version of the Nine-Tails while sending Disonasu to his death. Overpowered, Naruto almost gave in to the Nine-Tails's offer for power when Minato's voice urges the boy to control the tailed beast as Naruto assumes a new form and is engulfed in a chakra cloak in the Nine-Tails's image. But over time, as he stars to lose against the clone, the Nine-Tails starts to take control over Naruto's body and assumes a seven-tailed jinchūriki state with Kakashi Hatake and Yamato under to restrain the monster.