There is no such thing as a gut feeling, not really. If you suddenly start to feel afraid for no apparent reason, it's very unlikely to be anything serious. But it doesn't make it feel any better does it?

Twilight is up burning the midnight oil again, when suddenly every sense she has tells her that something is terribly wrong. There can't be anything really wrong though, not in reality.
Can there?

A short experiment in atmospheric horror.
Featured in the Royal Canterlot Library on 26/04/19
Now featuring readings by ColonialPone here, and by MrSnarky here.

The global dust storm of a century, the dying message of an indomitable robot, and a unicorn who just can’t let go of a mystery.

(Now with a dramatic reading by Skijaramaz - Tone Shift.)
(Russian translation available at ponyfiction.org.)

Celestia and Luna have lived long and suffered greatly. Luna, still insecure in her newfound grace, is anxious to secure herself against any further suffering. She sees in Twilight Sparkle (and in many others) the roots of ten thousand tragedies. Celestia proposes a wager.

A very loose retelling of the Book of Job.

This story is a sequel to Forever Mare

This story is a sequel to Nopony's Daughter

Discord has been sealed in stone. King Sombra took the Crystal Empire with him. The fledgling nation of Equestria has dealt with great monsters. Yet, something is rotten in the Everfree Forest. The fear of one more mythic woe is at hoof.

Princess Luna is worried that it might be her next.

And she's now at the point where she will do anything to escape that, even when nopony else believes in her.

Proofread and edited by VoxAdam. The content tag is for self-harm references only, not suicide. Contribute to the TVTropes page!

In a parallel universe, there exists an Equestria where the Princess of the Sun is not a pony, but one of the most advanced war machines ever created.

Featured on the front page! Thanks, everyone!

Check out an audio reading of this story by No One and Nobody here!

Twilight had never questioned the nature of the Tree of Harmony. To her at least, it stood as a sentinel, a silent guardian watching over Equestria and keeping disharmony at bay.

She soon starts to have questions and misgivings when she inadvertently witnesses the horrifying fate of hers and the rest of her friend's twisted doppelgängers. Did something happen to the Tree of Harmony, or was it always this way?

Twilight aims to resolve this mystery once and for all. Little does she realize that this mystery goes far deeper—the truth far more terrifying than she can imagine.

Will she be able to solve this nightmarish mystery with her sanity intact, or will she surrender and be lost to madness?

After some deliberation I chose to put a Crossover tag as the whole story uses many assets from several stories in the Cthulhu Mythos (most of them written by authors other than Lovecraft).

Fantastic cover art done by Mix-up!