This technique starts after Shoto uses his ice to thoroughly chill the air in the area around him. By switching to his fire, Shoto rapidly heats the air around him and expands it.
This environmental control allows Shoto to release a super-heated blast that devastates anything in its path. Shoto has displayed the ability to create two enormous fireballs and launch them from a distance into a mound of ice, creating an extremely potent explosion and allowing him to execute the technique from a distance.
Shoto first used this move during his match against Izuku Midoriya in the U.A. Sports Festival. The technique gets its name when Shoto uses a smaller-scale version of the attack to subdue villains. Shoto again used this move to capture Izuku along with Class A.
- Flashfreeze Heatwave is featured as a technique for Shoto's ultimate move in Jump Force.