There was only one explanation. For all of it. All of the strange, erratic behavior. Her irrational fear of the sun. Her nocturnal habits of locking herself in in the dark and closing all the blinds. Wearing her sunglasses everywhere, even inside! It was time to invest in some silver, garlic, and a wooden stake.

The Shaper is a smith of unparalleled skill, her creations the most sought after in the fallen world. When a pony named Lyra comes to her with a unique commission she has to put all her skill to the test to craft a weapon of great power. For Lyra's goal is not an easy one, and it is not just any weapon that can kill a Dragon.

A story inspired by this and this image, as well as this challenge by CDRW (whose fic A Still More Glorious Dawn Awaits is quite good).

What started as a normal friendly visit ends up taking two ponies on a trip down memory lane that leads them both to realize their friendship began even before Rainbow Dash's first sonic rainboom.

After an accident, Twilight's life is turned upside down and changed forever.
With her friends standing by her, she must manage to overcome new obstacles, learn a new way of life, and discover just how long secrets last when hidden from those who know you best.

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Now in audiobook form!: Youtube

On a dark night filled with even darker magics, an insane cult attempts to give Nightmare Moon a body and life of her own, utterly separate from Princess Luna. But, when the spell is interrupted by Celestia, something unexpected is created.

Now, a little black alicorn filly named Nyx finds herself living under the care of Twilight Sparkle, only to be haunted by memories and emotions from her past. Is she Nightmare Moon reborn or is she simply a doppelganger with a soul and mind of her own? Can Twilight Sparkle protect Nyx from those who refuse to see past her dragon eyes and black coat?

Or, will Nyx be forced to inherit the sins that may not even be hers and become the greatest evil Equestria has ever known?

Soarin. A household name across Equestria. One of the fabled Wonderbolts, Soarin has no shortage of fans, of both the male and female variety, not to mention those that supposedly love him. But there's something different about this one, about these letters. For one thing, they're not in envelopes and, let's get real, who sends scrolls anymore?

In a tale where Anonymity is considered everything by the young, lovestruck mare, will she ever be able to reveal herself to him in time to court him properly? Does she even stand a chance? What is she hiding that is so important that she cannot reveal herself? Will the author ever stop asking these stupid questions?

Canon to the Demonheart Sub-verse. Not an official part of the storyline, occurs after "Pyrophobia."
Sequel can be found here:
http://www.fimfiction.net/story/42725/Ghosts-of-Skeleton%27s-Past

The Cutie Mark Crusaders ask Rainbow Dash and Fluttershy about what happened just after the events of the Cutie Mark Chronicles; specifically, what happened to Fluttershy and Rainbow Dash immediately after the race. Reluctantly, Dash and Fluttershy delve into a tale. A tale of a young Fluttershy's amazement at the world she had landed upon, and a filly Dash's desperate quest to save her from that most evil of places: THE GROUND.