This story is a sequel to Split Second

Twelve years ago, she broke time. Two alternate timelines exist, each with a different version of Twilight Sparkle. Both versions of her are able to see the other. In this timeline, Sparkle is a Necromancer.

Or rather, she was. Sparkle is dead now, not that she cares. She's got a new body. With Thorn (her undead dragon son) and Cobalt (her apprentice and an assassin for hire) at her side, she's ready to take on the world. Again.

(Spoilers in the comments. Read at your own risk.)

Featured on EQD.
The Tv Tropes page
The Ask Blog

This story is a sequel to Split Second and won't make sense without it.
This story also loosely shares continuity with Lupine Tree. Reading that is not required.

Cover art by Swirling Line.

This story is a sequel to Twilight Sparkle of the Royal Guard

Between castle gossip, professional rivalries, a blooming romance, and a mysterious malefactor still at large, Decurion Twilight Sparkle has a lot on her plate. Hopefully, she'll make a few new friends as she moves towards the destiny she's chosen for herself.

As per usual, big thanks to Magello for the rad cover art!

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.

When Princess Celestia asks Twilight to make an official, royal visit to Romaneia, Twilight dreads the inevitable succession of dry, boring diplomatic events. The charming Lord Bela soon wins her over, but Twilight is about to discover that all is not as it seems in Bela's apparently peaceful castle. (A story inspired by Carmilla, Dracula, and other classic vampire tales.)

Written for the BadassTwilight = Total Domination Twilight's Nightmare Halloween contest.

(Spoilers in comments.)

This story is a sequel to Dusk's Dangerous Game

Twilight Sparkle, known to all but the three Goddesses as Lady Everstar, the Evening Sage, has ruled over her kingdom for nearly five centuries with all the wisdom and grace of which she is capable. Her lands are wild and exciting, the prospects good for those with brilliant minds and daring hearts. But now something has changed in the Evening Kingdom, something has changed the balance of power so profoundly that even Twilight herself cannot tell how events may unfold.

Across the ocean, an ancient evil is stirring, its dark hunger can finally be realized. Its servants are many, brutal, and cunning. They are found among the lowest of lows, and the highest of highs. With the balance of power so disrupted, it is at last time for their shadowy plans to come to fruition, to cast off the darkness and strike against the night.

It will take the power of goddesses, magic both familiar and ancient, and the most unlikely of heroes to save not only the Evening Kingdom, not only Equestria, but the entirety of Creation as we know it.

Sequel to Lines and Webs and Dusk's Dangerous Game. Knowledge of the previous stories is not needed, but reading them is, of course, encouraged.

Followed by Courts of The Magi.

One year after her coronation, Princess Twilight Sparkle is dead, killed by her own subjects out of fear and jealously. After the funeral, Princess Celestia isolated herself from the world, mourning the loss of her brightest student and daughter figure.

But she cannot weep forever. She must take control of her duties once more. Haunted by the memories of the assassination, and its aftermath, Celestia slowly makes her way to Twilight's resting place to find some closure.

Now With its own TV Tropes Page!

Sequel is up

Strange dreams.
Disjointed memories.
Curiosity.
Twilight Sparkle suffered from all of these. Sometimes they scared her. Sometimes they made her a better pony and friend.
But one day she would have to find out. One day it had to all come crashing down. She isn't just a pony, not just a princess. She's something much more mysterious...
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Well, now that the story is over, it's open to you! Have an idea for a continuation? Go for it!

This story is a sequel to Inner Demons

Play this song first!

Equestria's Darkest Hour was only the beginning... The end of days are fast approaching...

Twilight faced her darkness and made peace with it. Now she can face who she is, and not a moment too soon. The greatest battle in Equestrian history is about to begin, and she'll need to understand just how deep the darkness in her heart goes in order to face the threats to come. However, in preparation for the worst event in Equestrian history, she'll have to protect a mare that may be the key to everyone's destruction. Even worse, she has to deal with an old enemy/former friend that's intent on saving the world her way, which means killing the life that Twilight wishes to protect. But can a demon truly do an angel's job, or is Twilight simply deluding herself?

"Can I atone for my sins...?"

For years Diamond Tiara has been contending with dark feelings, night terrors, and blackouts she can't explain. When Apple Bloom, the love of her life, was here, she could handle it. Now that Apple Bloom is gone though, Diamond Tiara's sanity is slipping, and she's becoming something horrible. Good news, she's beginning to understand what she is now. Bad news, she hates it, because the more she learns, the less likely it seems she can be saved.

"Wh-what am I?! Apple Bloom, help me!"

She is the Guardian of Equestria, sworn to defend the golden land of Terra from any and all threats. Vale's life was saved by a Unicorn who's heart was more pure than even her own, but now she has to carry on her life and continue her own mission. That should be simple, except for three things standing in her way. Midnight has once again chosen to stand against her, the lover of the one who saved her won't leave her alone, and strange foreign emotions plague her, hindering her mission. All she knows is that something in her heart is saying this isn't right.

"What's holding me back...?"

These three, and others surrounding them, will play an integral part in the events over the next month. As for what their places on the board are, unfortunately that's not entirely up to them.

Note: if you haven't read the other stories yet, STOP NOW and read the following:
Inner Demons
Inner Demons: 10 Years and Inner Demons: Fragments of Truth (these can be read in any order, but only after Inner Demons)

Cover Art by my friend The Spectralist!

Inner Demons II added to the TV Tropes page?! WHAT?! Go here to read it!

Princess Celestia always knew that Twilight Sparkle was destined for great things, but she never revealed the source of that knowledge, not even to those closest to her. When the day of Twilight's true destiny finally arrives, can Celestia fulfill an ancient promise to save Equestia's past, present, and future, even it means saying goodbye to Twilight forever? How can Celestia refuse her mother's last wish?

Art by the inimitable Harwick

The Sequel to Number 12.
The Doctor and Twilight leap into the future, though it may be a far darker place than they envision. In the mean time somehow the Doctor keeps crashing around Ponyville, something to do with Fluttershy, but what?