Avalanche is Dominic Petros. He is a supervillain.He operated as a professional criminal, terrorist, and subversive. He first publicly appeared with the Brotherhood when they unsuccessfully attempted to assassinate Senator Robert Kelly during his hearings on the menace that mutants allegedly pose to humanity. The X-Men arrived to stop the assassination and battled the Brotherhood.Avalanche is a mutant with the superhuman ability to generate powerful waves of vibrations from his hands, creating highly destructive effects. The vibrations can cause an inorganic object to shatter or crumble into dust, and has been shown to affect organic matter as well. When directed against large objects like buildings or upon the earth itself, the vibrations can produce effects similar to those of an earthquake or avalanches within limited areas. Avalanche need not touch an object to affect it: he can direct the vibrations against it from some distance away from it.Avalanche himself is immune to the generation of his vibratory waves. However, if the vibrations were reflected back upon him, he would be injured.Avalanche is a fair hand-to-hand combatant.