As a troubled and rebellious teen, your attempts at self harm or 'cutting' prove futile. You cannot even properly commit suicide. With no other way to vent your angst you shoot up your entire school. With nobody able to stop you you continue this streak until everyone in the entire world is dead. As a side effect of super healing powers you are also practically ageless, and so you have all the time in the world to plot to extend your ways of terror upon other planets. The end of this scenario sees the entire universe destroyed.
Ma-Ti's 'Heart' power from Captain Planet.