Less than a few hours have passed since Twilight ascended to an Alicorn and Equestria Celebrated. As the kingdom rests she is called in the early hours of the morning after the coronation festivities to aid her mentor in a task the Sun Princess herself could not complete.
This task will test Twilight's newfound talent for crafting magic. It will take her on an epic quest to face a foe already contained in the darkest recesses of Canterlot Castle.
As Celestia's desperation grows and its bonds weaken, Twilight is entrusted to do what The Princess Celestia could not; she is entrusted to defeat it.
Monsters are what bear the most secret fears of our hearts. They bring forth our nightmares without mercy. To fight one risks becoming one. What we all should understand about monsters however, is that they are so much more than the shapes that they bear.
Originally on fanfiction but brought to you here. Originally written back during my "Oh my Celestia, Twilight is an alicorn now" bombshell.