"New Powers!!" (新しき力!!, Atarashiki Chikara!!) is chapter 415 of the original Naruto manga.
Sasuke's Amaterasu ignites Killer B in his full Eight-Tails form. As he rampages around in pain he almost crushes Karin. Sasuke cuts off his tentacle to protect her. The form recedes, leaving only B, defeated. Taka collects him and its unconscious members and takes them away. Observing Kumogakure ninja see this and send word to the Fourth Raikage of B's capture. At Mount Myōboku, Fukasaku explains the advantages of Sage Mode to Naruto. Naruto begins thinking about how senjutsu will allow him to complete his technique, but is distracted by Fukasaku's gift of The Tale of the Utterly Gutsy Shinobi.