Deep Regrets

One moonlit night, Celestia thinks about her past actions. And how she failed the one that needed her most.

It was for Equestria, but Celestia feels only regret for banishing her sister. Life has not been kind to her for the past few days. Ponies spreading rumors, fear of the sun and moon cycle stopping in it's tracks. But one night while walking through the Castle of Canterlot, she visits the library.

And finds something...