One day like any other, Celestia receives a strange letter containing a unknown spell from Twilight. It sends her on a wild adventure with many twists and turns--for it sends her 20 years in the future! While in the future, Celestia discovers what her sister has gone through for over a thousand years, why Chrysalis saved her life, what has happened over the 20 years she has been gone, and what darkness stirs in the heart of Twilight Sparkle..
The true enemy, however, is soon revealed, and the lines are drawn. The question is not who wins, but rather, what is lost, and what sacrifices need to be made to get things right again.
Edit: Writers block so no story
Warnings:
1. There will be some language in this. not much, but some.
2. This will be long. Long as flip.