The Transcendent Mind/Shin no Gekido

Shin no Gekido
Shin no Gekido (Lit meaning, "True Wrath") is a branch of The Transcendent Mind created by adding the usage of Busoshoku Haki to Gekido one of this style's seven techniques which allows for a drastic rise of the body's temperature with no damage caused to the body.

To use this style one must first activate the technique Gekido to heat up their own body and then they would porceed to harden their bodies with Busoshoku Haki to trap the produced heat within, this causes the accumulation of energy inside the body, after enough accumulation a practitioner would remove the applied haki causing the heat to be released at once either in the form of a heat wave or a burst of fire that comes out from the practitioner's body. As one can imagine this style requires a lot of training and and resistance to heat.

The fires produced by this style are usally exetremly hot and mostly released from the hands, it can be used in many ways such as small bursts of flames shot from the hands or it can be released after touching opponents to burn them, there are some very skilled practitioners that can even accumulate enough heat to release plasma for even more power but Haki would have to be used a second time in this case to protect the user from the heat after releasing it.