Equestria has sat in peace for over 1000 years. Celestia has trained her student and her friends to spread friendship. However, one being sees this as flawed. A biped simply calling himself "The Observer" has come to show her the problems with her choice of rule. Will she change after seeing the future? Or shall Equestria succumb to the sands of time like many other a great kingdom?

Mature for implied themes but happy ending so not bad.