Shoto has freezing powers on his right-side, and heating powers on his left-side. From his right he can lower temperatures, and launch waves of ice. From his left he can raise temperatures and shoot scorching hot flames. While he is capable of firing off blasts of fire, he is unable to control them after he has unleashed them. while he can freeze with more control with his ice powers, he cannot generate ice wherever he chooses. Basically, his Quirk does not grant him either Pyrokinesis or Cryokinesis, but instead allows him to just generate and fire the elements off in a chosen direction.
He is also capable of using both his right and left side at the same time. However, he has far greater control with his right side, as he has barely used his left side in combat. However, he is theoretically capable of using both with enough training.
Overusing his right-side puts Shouto in danger of developing frostbite, so he needs to use his left-side regulate the cold. The consequences of using his left-side are unknown, but presumably he can use his right-side for thermoregulatory purposes, just as he uses his left-side for his right.
This Quirk has been referred to as a Hybrid, indicating more like it may exist.
- Giant Ice Wall (大氷壁 Daihyōheki?): Shoto creates a humongous ice glacier. This move is first used in his battle against Hanta Sero in the Sports Festival, but is unnamed until the End of Term Test. A variation of this move, slightly smaller in size, is shown in his battle against Katsuki Bakugou.