[TEEN VERSION] The most enigmatic of monsters will not carry the ugly faces of one. A young draconequus named Discord has yet to learn this, and mortals may never do so. Oh, and the first lamia is created amidst all this turmoil.
Personally, Celestia has had few surprises — oh, there were a few: the unexpected return of her dear sister, Discord, the Crystal Empire's, and Tirek's escape. But most things, she finds, are nice and calculated... until now.
[TEEN VERSION] Discord comes to Celestia, wanting her help to fix a problem. There is a Smooze in danger of attacking ponies! Celestia had no idea there was more than one Smooze.
A few years after Luna's return it seems that Equestria will finally know an era of peace and appears to be on the verge of a new renaissance. Ponies are happy. Luna is recovering. Celestia is miserable.