In the darkest moment of Twilight’s life, where all who she cared for have left her, a voice gives her comfort. It tells her that she is not weak, that she is not worthless, that they were foolish to ignore her. When she is offered power and knowledge that was denied of her, Twilight accepts and changes the fate of Equestria.
This story is going through revision and some editing, anything mentioning Nemoroth or Horus should be ignored.