This story is a sequel to Darkness and Light
For one thousand years, Celestia had to live with the fact that she couldn't save her own sister, and had to banish her instead. And with nopony to comfort her, Celestia has to battle a mysterious voice, who seems to be in league with Nyx and is taking over Celestia. And Luna is no better.
Celestia's point of view is awesome! The idea of Sekmeth and Nyx is pretty cool. I really like it.
Thanks!