Her story is known, her defeat & destruction, and Princess Luna's happy ending...
Though, It in fact was not the end, just the beginning for Nightmare. As those that don't perish, often grow. Whether it's for good or ill is dependent upon the circumstances. These particular circumstances resulted in her becoming a complete pony of her own. Ever thankful of the new friend that gifted her that which she was missing, she persevered.
Into the future that she had built, the ponies that she brought into the world, the new family she made, and eventually the 'empire' (collection of colonies really) that her ponies forged amongst the stars. Far far from Equus.

However, with such growth comes longing. Ponies have an inherent desire to see their families, old and new. Now that she is one, the desire to really know them and love them has long awakened.

'Since Mother and Auntie are alicorns, they must still be alive out there...somewhere?'

With so much that she needs to apologize for, so much to say, so much to know... the day she can see them again just cannot come soon enough. However, it's been more than 9 centuries now, that they thought she was only a thing, and destroyed at that.
Her wait is at an end, though there are always bumps in the road of life.

Though this story is set upon Earth, there are only ponies there now. The world 'building'(unwritten prequel) is a slightly apocalyptic one. Which could even be considered a bit of Nightmare's penance; to have to helplessly witness the end of a civilization (and side step being swallowed up by), in order for her to get a second chance & a clean slate to make her own future. Not everything was lost of them however. After all, where would the idea's of advanced technologies have come from otherwise?
Prequel here: The Early Days

This story takes place many centuries after, in better days.
Part 1; is the lead up to the reunion, and world building. The other princesses do not yet appear (tags adjusted). Also re-rated teen due to married couples (slight comedic romance)

Seath the Scaleless, White Dragon God of Verdite, Traitor to the Everlasting Dragons, Duke of Anor Londo, Grandfather of Sorcery, and now the new friend and mentor to Twilight Sparkle? What will happen when two like-minded souls from opposite ends of the morality spectrum match wits? And what will remain in their wake?

A somewhat more meta twist on a MLP/Dark Souls cross-over, inspired predominantly by a few pictures I found of Seath and Twilight together, and my bewildered discovery that for all of the stories on this site that cover these two franchises, there's only one that focuses on Seath the Scaleless and so far it hasn't seen any updates in over a year ( http://www.fimfiction.net/story/68621/scales for those curious).

For those who haven't played either the King's Field or Dark Souls games worry not. I'll do my best to either explain the lore of both in the story itself, or add an author's notes for anything that gets referenced.

UPDATE: New custom cover art at last! Courtesy of Cryophase ( http://cryophase.deviantart.com/ )

Editing is courtesy of lunarstallion

In the chaotic period following the fall of the Covenant Empire, the Shipmaster Vraal Rutaen does his best to ensure the safety of his race. For years he and his crew have fought countless threats, searching at the same time the precious Forerunner technologies on which depends the future of the Sangheili. But this is not enough. The Sangheili, once proud warriors that fought in name of glory and honor, are now without a true purpose to live, risking the extinction. But when they discover accidentally a new planet that defies every law of physics, maybe they've also found the answer to their existential question. All depends on the first contact with the inhabitants.

Chapters 1 to 18 edited by Requiem17.

"Speech."
'Thoughts.'
"Speech in a foreign language." (Ponies hearing Sangheili language - Sangheili hearing human/pony language)

THE STORY IS NOT ABANDONED. I'M JUST TOO BUSY TO CONTINUE IT AT THE MOMENT, SO PLEASE STOP ASKING WHEN I WILL UPDATE IT. READ MY BLOG FOR DETAILS.

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 Dead/Light

Twilight's life definitely took a strange turn when she died. Of course, this won't stop her from living it to the fullest, whatever that entails.
Equestria will never be the same.

After the first, chapters will alternate between serious ( - ) and silly ( ~ ), because I didn't want the story to be limited to just one. Most will be standalone, and in no kind of chronological order; expect little correlation between chapters and occasional verb tense changes from one to the next.

This story should be considered in perpetual hiatus, as it will rarely be the focus of my attention. Do not expect regular updates.

Rated teen just to be sure. Cover art made by this butt.

A normal day was all it took.
A simple failed prototype, a missed experiment.
There was an explosion, and I woke up. I don't really know what happened between those two events, but I'm fairly certain I shouldn't have awoken in a small, dark box.

I'm scared.

Cover art by the amazing Avatar of Madness!

Ep·​i·​proct | \ ˈepəˌpräkt \

definition of Epiproct

1: a plate on the thorax of certain insects that is usually a dorsal part of the 11th segment

2: a believable name for a Changeling that has the letters "Pip" in it.

Now with a Youtube reading and not just one but two written reviews!

This is an entry in the Snippet Series, an anthology of old oneshots that I (and my good buddy Str8aura) wrote based around interesting pics I found. New ones will be posted every other Thursday for the foreseeable future.

This story is a sequel to Princess Celestia The Changeling Queen: Stories Behind the Mask

At the Royal Wedding, Chrysalis and the Changelings were revealed to all of Equestria.

But another mask was torn away that day. A mask born for a thousand years. A mask created on one promise. A mask, that has become synonymous, fused, to its bearer.

A mask that when ripped off, causes Twilight, her friends and Luna to question everything they ever knew about the one pony, one very important pony.

At the Royal Wedding, the meaning of the phrase 'Princess Celestia' changes forever.

NOTE: Chrysalis is NOT Celestia!!! That'd be impossible to pull off.

Credits to: Plainoasis for the design of the cover art
Note 2: Original cover art here: https://angelea-phoenix.deviantart.com/art/Contest-entry-Changeling-Celestia-337023552

Pre-read/edited by Zervziel,
Blankscape,
FinalFan,
Courage Fire
Aurora Borealis

Side Stories to this can be found: here.

An audio-reading on youtube up to Chapter 21 is up by StraightToThePoint Studios. I'm aware there are others but this is the nearest complete one: [embed]https://youtu.be/X3eMW673CSY[/embed]

There are also 2 print versions of Princess Celestia:The Changeling Queen. Nonexistent Publications run and Ministry of Image's run.

Contribute to the TV Tropes Page (thanks to Babs_Seed72 for getting it up)

Sheogorath, Daedric Prince of Madness. Ruler of the Shivering Isles. Crafter of dangerously unstable magical artifacts. Cheese aficionado. A lonely old man.

Discord, Spirit of Chaos and Disharmony. Once Ruler of Equestria. Master of unraveling reality. Maker of cotton candy clouds filled with chocolate rain. For some reason an infant.

Now read of this pair as Father and Son.

...abandon Logic, all ye who enter here.

Part of the PWNY-verse.
New cover image by ProfessorCatPro

Idol Hooves holds a special place in Equestria. He's probably the only exiled changeling to serve in the Royal Guard, or at least, that's what he expects, as exiles don't really broadcast that fact. However, it's well known that Princess Celestia loves all of her little ponies, and her guards perhaps more so, and that makes it one of the best ways for a changeling to discreetly feed.

But how does a changeling even get there, let alone get exiled in the first place? For that matter, why would it ever go to Canterlot? Set a number of years before the series proper, before Luna’s redemption, Idol details how he was exiled, the ponies he’s met, and the series of misadventures that led him to joining the Royal Guard, and should continue a good ways into the series, as something of an alternate perspective.

Soon, he’ll have to deal with a boisterous new princess to serve and a royal wedding in the works bringing a third to power. Will his old instincts bring this new life crashing down around him? What precipitates Chrysalis’s ill-fated assault on Canterlot? Is it really so wrong for a changeling to enjoy good craftsmanship to an obsessive degree?

New cover art provided by the fantastic Carnifex

And a TVTropes page here.

And an Ask Blog of questionable canonity!
Out of Idol Curiosity

Fanart by Norad2! Major thanks! Short For a Royal Guard

Art by Egophiliac of Idol and his Daring Duckie Please don't tell him what that brush is meant for.

Rating updated to (T), it's a bit darker than (E)
Comedy Tag added as well
And changed the character tags a bit.