Moment of Awakening

is episode 68 of the Naruto: Shippūden anime.

Synopsis
Naruto deduces that Fūka's secret consists of switching bodies to use each corresponding element and that her hair preserves her youth and body. Naruto damages her hair and it takes a life of its own dispensing the body, but Naruto finally kills it with a Rasengan. Meanwhile, Asuma manages to break free of the electric barrier, catch up with Kitane and defeat him in a short fight. Realising that Kitane is no more, and that his three other companions were killed, Furido causes the three other ninja guardians to disappear. But Furido has a back-up plan, Sora.