Phosphor

Flashfire Heatfist is a Super Move performed by Shoto Todoroki using the Half-Cold Half-Hot Quirk.

Description
Flashfire Heatfist allows the user to channel both halves of their Quirk on either sides of their body, effectively giving the user two Quirks.

This move is first developed by Shoto during a training session between members of 1-A in a U.A. courtyard. It is described by Shoto as his body coming together "as one," as well as creating "a body even Dabi can't burn."

This move gets its name when it's used against Dabi during the second War.

Trivia

 * Flashfire Heatfist's name is similar to Endeavor's signature technique, Flashfire Fist, that both Shoto and Dabi both know how to use.