The Life Aura Center is one of Equestria's top medical research centers, the producer of spells and medicines that have cured many once-fatal illnesses, and they continue to produce quality technology and cures. No one wants to think that they're doing anything unethical, but Celestia has her suspicions, so she sends Twilight to investigate.

One symbiotic pairing with an alien later, Twilight realizes Celestia was right to be suspicious. Now, working together with the strange creature inhabiting her body, Twilight will have to expose the center's shocking truth. And not get killed in the process. It's gonna be a wild ride.

Now with an audio reading by Mr. Snarky on YouTube! Please give him your support!
Part 1 Chapters 1-4
Part 2 Chapters 5-12
Part 3 Chapters 13-19
Part 4 Chapters 20-25

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The story of 'The Mare that eats the Monsters' is an old, but still very well known Equestrian campfire and bed time story, often told to scare little fillies and colts into behaving themselves. It tells of a mare who loves Equestria and the ponies who live in it despite how frighteningly different she is. She protects ponies across Equestria from nightmarish creatures and monsters that would seek to kill ponies wherever possible.
What most ponies don't realize, but what Twilight Sparkle is soon to learn, is that the mare of the story was and is very real.

And the stakes of her mission have never been higher.

(This story has the horror tag, yes, but it isn't the dominant theme here.)

Part 1 of the Shadow Trilogy

As Twilight Sparkle enters her third year amongst her friends in Ponyville, she finds herself plagued with strange dreams of an unknown power whispering dark secrets to her. The voices speak of Power, of the strength to protect what she holds most dear, of the great knowledge she could attain, such that no force could ever threaten her lands, or her friends, ever again.

Though she shrinks from this voice, the lure of greater knowledge, of magical power far beyond what she currently knows is enticing and alluring to her, eating away at her resolve even as the lack of rest begins to wear her physical defenses down.

What is this voice, and what does it plan for the most faithful student in Equestria?

Note: Events diverge from canon following the events of "Games Ponies Play"

Part 2 - The Twilight Fall
Part 3 - The Twilight War
Links removed in compliance with Fimfiction policies

The German Battleship Bismarck is transported to Equestria after being sunk by the fleet of Admiral John Tovey of the British Navy. With 2090 out of the 2200 men in the battleship, the Kriegsmarine sailors will brave uncharted and unknown waters.
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The Equestrian Navy is being equipped with the latest of front-line technology, the 'water-carriage', or ship. It is used by the navy for trading and protecting other ships using pirate-like tactics. However, they would have a shock of their own with the existance of another, unknown ship which seems not to be with theirs or others.

It's been a year now since Twilight vanished after attempting a sonic rainboom. She's spent her time fighting in WWII alongside her brothers in arms. Now, after a bad jump, she finds herself back in Equestria. After a well deserved rest, a nice, warm bath, and the most unusual breakfast, she begins to tell her story.

Twilight Sparkle, Element of Magic and Hero of Equestria was thought lost in the event known as the Canterlot Catastrophe. But when a recon unit lead by Princess Celestia and Luna to see is anything can be salvaged from the castle finds traces of a survivor that leads them to her everything changes. However no one can live through what she has and truly survive intact, what will she do when she is saved? Will she even be the same pony, or something... else?

Twilight Sparkle has been living in Ponyville for 7 years now. In that time she has faced great challenges, fought greater foes, and made even greater friends. But one day she finds a book. A book she had completely forgotten about. A book she thought had been destroyed. A book of necromancy. Will she submit to the darkness within her or will she stay true to her values and stay in the light; or maybe a bit of both?

Chrysalis sent Twilight deep into the abandoned caves beneath Canterlot to stop her from interfering with her conquest of Equestria, but what if that was not the first time Twilight has been down there. And what if Celestia was not the first individual to take notice of Twilight's potential, nor the most powerful. What happens when the hunger for love clashes with the hunger for knowledge. And which will Twilight choose?

Cover by Santafer

My little pony is owned by Hasbro
Elder scrolls is owned by Bethesda Softworks

Twilight Sparkle never was a Unicorn and she didn't even know it.
What happens when her true heritage comes to light? Will she willingly embrace it? Or will she be forced to?

Beware of spoilers in the comments!

Edited by uTTerAbsurdity, Zervziel, Stormwatch and Gwenio

Cover art by the talented Cartoonlion and colored by the equally talented Stormwatch, original can be found here

Click here for the Tvtropes page

Twilight did her duty. She saved everypony she could, except herself. Now trapped by an evil cult, in more pain than she has even been in before, and dying on a sacrificial altar, she calls for help. The Nightmare answers.

Will Twilight become the next evil to threaten the world or will the Nightmare simply be glad to have some freedom? One thing is for certain, Twilight's life will never be the same again.

The Editors
Cander (CH 1-Current)
Yutah123 (CH 8-9)

Now with an excellent reading by StraightToThePointStudio (Currently only up to CH 30)

And we even have art!
[Warning Spoilers] Twilight's Nightmare Art