This story is a sequel to The Assembled Letters of Twilight Sparkle, Protégé of Emperor Discord

After getting a taste of Friendship and questioning her allegiance to Discord, Twilight Sparkle chose instead to accept the will of Chaos and remain a student of the Emperor. Now, she has been charged to return to Ponyville and plant Seeds of Discord around the Tree of Harmony, but there are more things than broken friendships awaiting her arrival in Ponyville.

A note on the [Dark] tag: This fic is not grimdark.

It is however, an adventure story with high stakes, and themes that may touch on more serious matters, such as brainwashing or mental/emotional abuse. There is also some brief moments of violence and intense danger that, while not excessive, may be troubling to some. This tag was actually something recommended by one reader after Discord's psychological games with Twilight in the previous story, and I think it's time to add it. Link to reddit discussion where I made the decision, slight spoilers for Chapter 6.

Please don't let it turn you off from the story, just consider it fair warning that some parts may be slightly disturbing to more sensitive readers.

[This story has been rewritten, link to it is here ]
Canterlot is getting ready for the wedding of the century, Princess Mi Amore Cadenza is marrying the Captain of the Royal Guard and part of the draconic royal family will be in attendance. In addition to helping prepare the most high profile wedding Equestria has seen in living memory, Celestia has tasked Sunset Shimmer and the rest of the Elements of Harmony with befriending the future queen of the Dragon Empire and her entourage, the first Sorcerer the Empire has ever had. One thing is certain, this will be a wedding that nobody ever forgets.
(New description has be made by none other than DoomManta)

(Story has been inspired by This picture) Go check out the person who did it Zig-Word

New cover art is drawn by http://akerabronzpaw.deviantart.com/ It may say a different name but same person.

Note to all: This story has been made before the season 6 ep 5 "Gauntlet of Fire" was made but may have some details about it. ;)

Also this story got Featured, a lot... thanks everyone xD

In the dark forests of Tramplevania dwells a coven of vampires, led by a deadly draconequus named Discord. For many years, his only interests have been in his own survival, until he stumbles upon a beautiful mare with a heart pure enough to care for a monster like him.

Music to listen to.

Cover Art by IduChan

Alternate Cover Art

More fanart by Whiteheart7
CandySweets90240
autumnruby18

AJ Pony's review

The Great Tragedy. The night an era ended. The night the skies stopped turning. The night the Canterlot palace, along with all of its occupants, was utterly obliterated.
Nopony knows how it was done or by whom. But they do know that one unicorn stood at the center of that calamitous explosion, and they know that Twilight Sparkle survived where two immortals had perished.
Twilight awakens in a world a shadow of its former self, abruptly thrust into the fallout of a disaster she remembers nothing of. Faced with a foe that is perhaps more familiar than she might realize, Twilight must find a way to restore her broken world and carry on the legacy of her beloved princesses.

Huge thanks to my proofreaders Some Person (chapter 1-12) and RazerWrites (chapter 12-14). The story would have been much worse off without them.

When Shining Armor and Cadance come to Canterlot to celebrate the anniversary of their wonderful wedding with Twilight Sparkle and her friends, they are visited by a strange stallion who desperately needs their help. Surprisingly, the strange visitor is Shining Armor from an alternate world where the Canterlot Wedding was a complete disaster. In that world, the betrayal of her loved ones and the deaths of both Cadance and Queen Chrysalis drove Twilight mad and caused her to succumb to her darkest emotions and become Equestria’s newest and most dangerous enemy: Midnight Sparkle. Allied with King Sombra and the Crystal Empire, she has waged a vengeful and merciless war against all who do not support her. Do Twilight and her friends have what it takes to save a world where certain events happened differently from those in their world?

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.

What should one do when they find their current knowledge lacking? After the changeling attack, Twilight has to answer that question and for her the solution is simple enough. But her chosen path may yet turn out to be her downfall. Will the cost of knowledge be too high? Or will she be victorious in her journey into the paths of darker magic? One way or another Twilight will find it out as she learns under her new teacher. There is however one thing everypony close to Twilight should remember, that history likes to repeat itself...

**********

A/N: Tags will probably be added as the story progresses. Updates may be irregular. Flames will be ignored, constructive criticism is welcomed. Now the image: background by me (and it shows), NMM recolor by DoctorXFizzle.

A year after the Battle of the Bands, high school graduation is nearing and the girls are ready to face the world, though Sunset Shimmer worries that they might drift apart. But when Twilight's human self arrives and ends up getting infected with dark magic, they must call upon Princess Twilight once more to engage in a battle that will decide the fate of their worlds.

Tagline: A Duel of the Duplicates

BTW this is how I thought the third Equestria Girls movie was going to go.

Covert Art done by Eveyann.