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

The residents of Ponyville are unaccustomed to violence, but recent attacks are shaking up the normally peaceful town. On top of this, Twilight Sparkle has been experiencing short bouts of memory loss and is getting concerned with her own health. The truth in the situation may be harder to bear, however.

After the Changeling's failed attack, a full-out crusade is set against them. Many find a way to simply slip away. One is hapless enough to fall into the hooves of those his kind fought against. The changeling is promptly sent to the only pony Celestia could trust with such a thing.

Completely revamped, and thanks for constructive criticism and support behind the scenes (you know who you are, people).

It is three months after the Royal Wedding, and normalcy has returned to Equestria... for the most part. Pinkie is the same old Pinkie, Rainbow Dash is still addicted to the Wonderbolts, Rarity is still trying to learn Prench... but for Twilight, things are not the same. Ever since the Wedding, she's noticed an almost unnoticeable distance from her friends and from Celestia. This alone would be enough to bother her, but to make matters worse, she has been tormented by a dream that she cannot remember and physically cannot rest for fear of.

The tension is building, and something is bound to snap. If you've felt death and loneliness... what would you do to keep your loved ones from suffering the same fate?

Hello, this is your author speaking.
I know you're anxious to get to reading the story with the cryptic description would just like to point out a couple things before you get reading.

First of all, this is my first MLP fanfic, and it is set as an AU beginning just after the S2 finale, so I would appreciate constructive criticism. Not flaming or silent downvotes; give me criticism!
Secondly, it is important to understand that the AU tag seen above possesses two meanings. Not only is it an AU in the literal sense as it utilizes my own expansive worldcanon (dubbed Nidus) but in addition to that, it is an AU in that it does not accept the events of season three as canon. This is due to it chronologically beginning only 3 months after season two. The events of season three may appear, but they will likely be warped.
Lastly, I need to point out that I will probably be editing the tags and characters as this story goes. This being my first story, I'll need time to get a handle on the nuances of the submission system.
Thirdly, Please tell me if any of the fonts I use in the story go wrong. There are bound to be a few errors even with my prereading, so if you find them do say something.
Finally, I'd like to thank RoseyTail for her permission to use this marvelous image as my cover.

Thank you, and enjoy the story of Dark Horizons.

I have something I want to tell you.

It's a very simple thing. A short little phrase.

I wonder if it still matters, though, in a world like this.

It matters to me, but I'd like to know if it'll matter to you.

Audio Reading by journcy!
Featured on EqD! - 10/09/2012
Inspired by the image "Twilight's Library" by SpyroConspirator. Cover used with the artist's permission.
Also featured on the Pony Fiction Vault! - 11/03/2012
Spotlit by The Royal Guard! - 02/04/2014

Rainbow Dash doesn't like anypony touching her hooves for a reason. While at a slumber party at Rarity's, Rainbow's closest friends are about to find out just what that reason is. She only wished that it was simply about getting the hiccups.

Rarity, Jedi Knight of the Order of Tython, has been a model Jedi her whole life. Even though training with her younger sister, Sweetie Belle, has not made much progress, she is patient and respectful of the Code of the Jedi. Applejack is still a Padawan, despite her many years at the Academy, due to her headstrong and stubborn nature. The arrival of Apple Bloom on Tython may be the one thing she needs to turn her life around as a Jedi. Both ponies' lives are flipped upside down, however, when Flesh Raiders ambush Apple Bloom and Sweetie Belle and take them to be indoctrinated into The New Order, a group of radical fallen Jedi that have learned how to control the Flesh Raiders and plan to destroy the Jedi Order.

Now, with this crisis on their hooves, Applejack and Rarity are forced to work together to bring balance to the Force. Will Applejack overcome her headstrong nature, or will her passions override her judgment? Can Rarity maintain her honorable reputation in the face of her sister's capture, or will this new threat cause her to stumble? And most importantly, will the two be able to survive one another, or will they butt heads while the world falls apart around them?

Rainbow Dash, a newly promoted Sergeant in the Galactic Republic forces, has been given the prestigious honor of joining Wonderbolt Squad, the best and brightest special operations unit in the galaxy. They're elite, they're fast, they're efficient, and best of all, Dash is one of them. But when she sets hoof on the dusty, rocky world of Ord Mantell for the first time, she discovers very quickly that being the best does not make you invincible. Her selfish pride may get in the way of seeking assistance, and even the persistent pestering of a certain Smuggler may not be enough to save the Sergeant from an untimely demise at the hands of the rebellious Separatists plotting to take over Ord Mantell.

Ten years after Celestia's fall to the nightmare, the final battle for the fate of Equestria begins.

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Just a one-sitting one-shot that I cooked up after seeing :Demon: by familyof6 on deviantart.

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?