Avalanche

Dominikos Ioannis Petrakis is a mutant who goes by the alias Avalanche.

Powers
Seismic Wave Generation: Avalanche possesses the superhuman ability to generate powerful seismic waves from his hands, creating highly destructive effects. The vibrations can cause an inorganic object to shatter or crumple to dust. 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 is himself invulnerable to the effects of generating these intense vibratory waves. However, if the vibrations were to be reflected back upon him, he would be injured.

Weaknesses
Avalanche's power has little or no effect on organic tissue. When he once used his power against the Hulk, the Hulk was uninjured, but the resulting feedback shattered the bones of Avalanche's arms (which have since completely healed). Hence, although Avalanche's vibrations have little or no effect on organic tissue, the reflected vibrations ("feedback") can injure himself.