Hyouretsuzan

"Hyouretsuzan: Down + S.M. button while jumping. A dive attack. Effective against surface enemies."

- In-game text

Hyouretsuzan (『氷烈斬』), also known as "Ice Fury Slash", is the special technique that Zero learns after defeating Frost Walrus in Mega Man X4 

Similar Techniques

 * Quake Blazer from Mega Man X5
 * Rakukoujin from Mega Man X6
 * Enkoujin from Mega Man X8

Counterpart to this Technique

 * Frost Tower