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The Frog Kata is a fighting style, and one of the Five Form Fists, used exclusively by those who have mastered Sage Mode. The senjutsu chakra used during Sage Mode "activates" the body in various ways, enhancing the user's speed, strength, stamina and durability. In Frog Katas, the natural energy used by the practitioner to create senjutsu chakra, also surrounds and encapsulates the user as an aura of natural energy. This aura of the Sage's senjutsu chakra can act as an extension of their body and cannot be seen by anyone other than those who have trained in senjutsu. By employing this aura of natural energy, a Sage such as Naruto can use this aura to extend the reach and force of his physical attacks. Punches that a Sage throws that seemed to have missed, actually hit and send the target spiraling back. One punch can cripple and completely finish off an opponent.