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.

Twilight Sparkle, also known as Medusa, is a hardened criminal mastermind, and the leader of what was formerly the most feared band of criminals in all of Equestria. That was years ago. Now, her crew is in shambles, and she looks to two-bit thug Rainbow Dash to bring it back to its former glory.

With Twilight's genius and experience, combined with some fresh blood, the Mythos Crew may become more formidable than ever.

Fluttershy loves animals. Her special talent is taking care of them, after all. However, there is a darker side that her friends rarely see. Ever so often, a creature under her care suffers and not even she can fix it. She has grown accustomed to doing what needs to be done in those situations.

Perhaps a little too accustomed. When a tragedy hits close to home for her, she realizes that there are others out there suffering, and she can help them.

She is the Element of Kindness after all.

Cover art by the awesome xXKatrynaXx

This story is a sequel to Princess Celestia: The Changeling Queen

This story is a direct sequel to Princess Celestia: The Changeling Queen. Reading that first is necessary to understand any part of this story.

Co-authored by vren55 and Zervziel

Alternia, sister to Chrysalis, ruled Equestria for a thousand years, disguised as Princess Celestia, while the alicorn slumbered in a healing sleep. Now revealed, Alternia prepares to become Equestria’s first changeling princess, and prove herself to the ponies she loves at the side of her co-rulers Luna and the newly-returned Celestia.

But even as the crown descends onto Alternia’s head, something is stirring in the depths of the Eastern Sea, something that will turn the surface world onto its head. Some power that could destroy Alternia, and all that she loves, before she can even regain the approval of her own ponies.

Will Alternia restore the trust her ponies once placed with her? Will she found a hive? Will she find love?

All that is certain is that Equestria, and the world, will never be the same again.

Now with a TV Tropes page.

Empress Tethys and the Kelpies Created by Zervziel

That Fantastic Cover art is by Plainoasis

Pre-read and edited by:
Blankscape,
FinalFan,
Courage Fire
Cosmic Cowboy

Princess Celestia has been in love with Twilight Sparkle for years. The rescue of her sister had been the start, but since then Twilight has saved Celestia, Luna, and their kingdom countless times. However, Celestia's true feelings have remained hidden, even from herself.

That is, until the day her love is revealed to her through a dream. But Celestia is determined to keep her feelings to herself. She has no idea how Twilight will react, and would prefer things remain they way they are, with the two Princesses as friends.

Unfortunately, Luna immediately finds out. A small group of ponies is quickly gathered, all with one goal: to force Celestia to confess her feelings and end her thousand-year relationship drought.

This causes so much chaos that Discord goes on vacation and will not be appearing in this story.

---

Edited by ShutterflyYay from chapter four onward.

Set in the EqG-verse, past Rainbow Rocks (and ignoring Equestria games)

Twilight has been thinking. There is something about Rarity that doesn't make sense. Something that's not for real.

That Trottingham accent... it can't be genuine.

And this day, she asks the question. And Rarity answers, and NOONE could have guessed what happened next.

This is neither edited nor proofread. It's just a silly little thing I wanted out of my mind. The idea came from reading Persona EG, yesterdays chapter.

Twenty years later, Celestia has for the second time taken on a new private student. Twilight can no longer be the Faithful Student, but feels she has failed to become anything else. She must find out what and who she now is—and the difference between these things.

(Non-Twilicorn universe. On EQD March 17, 2013.)

Rainbow Dash has always been full of herself and always thinking that she was the coolest mare in Equestria. She had always suspected that all the mares were into her, jokingly. Then one day it suddenly started coming true...

When Spike tries to get help from Celestia he only sets off a chain of events that will forever change Equestria.

(Featured 7/22/14 filtered view only though)
(What? This actually got in the feature box without any filters on 7/23/14 Thanks for all the support guys.)
(Sex tag because of the nature of the dialogue and because reasons)
Art by PolyCysticOvary from deviant art. Used with Permission.

Nopony has heard from Fluttershy for three months. Not Rainbow Dash, not Rarity, not even Pinkie Pie. Her friends have been tending to the cottage and her animals, keeping it clean and organized, but even with Twilight's constant magic scans and a semi-constant guard search Equestria-wide, no hint has been found of where she went, how she vanished, or why she didn't tell anyone. Some ponies even think, in their darkest nightmares, that she might be dead.

Then she shows up one day, very definitely not dead, but just as definitely not the same as she was.

And does she have a story to tell. Boy, does she ever...

Coverart by Paladin.

Twilight Sparkle, pulling another late night, is finally confronted about by Spike and Starlight Glimmer. She reveals that she's been studying one of the realities she saw, specifically the one seemingly ruled by Flim and Flam. She just can't figure out how those two con artists could be as much of a threat as, say, Tirek or Nightmare Moon.

And then Discord shows up, telling her that she's looking at her information wrong. He volunteers to show Twilight, Spike, and Starlight what that reality is really like...

#1 in the Featured box on 4/25/2016. WOW. I'm... honestly surprised that so many people like this little dialogue heavy stream of consciousness fic. Thank you all very much!