He can control the size of the ice wall to some degree. When he used this technique against Katsuki Bakugo, Shoto created a much more controlled version compared to when he attacked Hanta Sero with it. The major drawback of this move is that it drops Shoto's body temperature to his limit.
The technique was given it's name by Momo Yaoyorozu during their battle with Shota Aizawa. She calls it Shoto's signature move from the U.A. Sports Festival.