Twilight Sparkle has spent months researching chaos magic, developing a new spell to unlock magic nopony has ever experienced before. But when something goes wrong with casting, Twilight finds herself turned into a Draconequus and unable to control her new chaos magic. If she ever wants to be a pony again, there is only one who can help her learn to control her new magic.

Of course, learning from Discord was never going to be simple. And after a while, being a draconequus doesn't seem so bad anyway....

Based on the concept by Lopoddity

Editing by DB_Explorer
Proofreading by Mac349 (Ch. 1-11), Trippy998, Just A Fabulous Cat (Ch. 1-5), Doctor Candor and skysthelimit (Ch. 1-11).

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

Play this song first!

Twilight Sparkle has always been looking forward to her 21st birthday. It's the day that she's finally recognized as an adult mare, but also the day she's finally able to learn magic on the highest level. What should have been a great day though, turns out to be the most horrific day in her life. She finds a prophesy talking about the next great evil in Equestria, and it's HER! Now she's falling, slowly becoming the very evil she swore to fight against, and not even her closest friends can pick her up in time. In the end, she may even...

Apple Bloom is tired of being the last in her class to not have her Cutie Mark, but her friends Sweetie Belle and Scootaloo aren't going in the right direction to get their Cutie Marks, and she knows it. In order to get her Cutie Mark the right way, Apple Bloom begins to have thoughts of separating from her friends, and getting her Cutie Mark on her own. But her search for her Cutie Mark opens up to a major mystery in Equestria, and Apple Bloom will discover much more than just her special talent...

friends become enemies...

destinies are revealed...

light fades into the darkness...

and through it all, a hero is born...

This is the first main story in the series.

New cover art by my friend The Spectralist.

Link to the TV Tropes page!

Twilight Sparkle broke time when she got her cutie mark. Now Twilight and Sparkle are sisters from another time. Twilight is hailed as the potentially greatest light magician of all time, and already has a reputation as a hero by the time she goes to Ponyville. This isn't her story, not primarily.

Sparkle is an orphan - her dark magic killed her parents. She lives with her brother in Canterlot's industrial sector because they can't afford anything better. She can't leave either. She's a natural dark mage; while Sparkle won't go mad like Sombra, her reputation is hardly any better. Worse, the law doesn't see her as a good pony.

The fact that the dead don't stay dead around her, or that Thorn - Spike's double - is an undead, soul-eating abomination, are other matters altogether.

(Also has some Slice-of-Life, but fimfiction tags won't let me put it with Adventure.)

Has an ask blog to go with it: Ask Sparkle and Thorn.
Also has a TvTropes page: Split Second Tropes.

Featured on EQD.

Cover art by Swirling Line.

No important political meetings to attend? Check! No letters to answer? Check! A magical and child-safe gift for Flurry Heart that she's sure to love? Check!

Her schedule was clear. Shining and Cadence were off on vacation. She'd prepared all her materials. Twilight Sparkle was more than ready to spend a fun-filled weekend babysitting her favorite niece.

But she wasn't prepared for King Sombra's return. Nopony could prepare to be trapped with him inside a storybook of fairy tales.

And nopony's ever ready for an unhappy ending...

Proofread by: Alicornpriest

Winner of November 2017 NaPoWriMo: Goal of 50k smashed!

Now Featured on Equestria Daily - First hit the Featured Box on April 28th!