SaiyajinPerfection

I agree with Darkprince. I seem to recall that the first time it was mentioned was when Roshi introduced the Kamehameha in chapter 12 or 13 of the manga. Yamcha explains to Puar how the fabled technique at that time (the Kamehameha) was stated to work, explaining that the user gathers their latent energy into their hands, and unleashes all of it in a single burst.

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