Naruto Nine-Tails Chakra Mode

After his close victory against Pain, Naruto realised he could no longer avoid using the Nine-Tails' power and sought Killer B, the jinchūriki of Gyūki, to learn how to control it. With his mother and B's help, Naruto was able to separate and take most of the Nine-Tails' chakra, giving him access to Nine-Tails Chakra Mode, which massively increases his speed, strength, and defences. As conquering the Nine-Tails was not the same as cooperating with it, Naruto at the time couldn't use the complete output of the fox's power and had to exercise extreme caution when using Nine-Tails Chakra Mode, as it could cost him his life.Eventually, realising its own respect for Naruto after all he had endured in his life and the type of person he has become, Kurama decides to accept his friendship. With this new unity, Kurama freely gives Naruto its chakra and access to Tailed Beast Mode, which was yet another increase in speed, strength, durability, and the ability to create Tailed Beast Balls.