Twilight faces the thought of immortality with her usual aplomb: falling down into a ball of misery and confusion about her role, and what she will do in the eventual absence of her friends and family.

That is, until a much older Twilight Sparkle takes the time to talk to her.

A tale from history. A pegasus, broken and injured. Alone in a cave.

A voice in the dark.

Love is one feeling that can never be taken from someone's heart. No matter how many years of separation, no matter what wrongs were done in the past, no matter how much enmity exists between two ponies, love will always stand; at least that's what Nightmare Moon is hoping for. 700 years ago was the last time she had seen her sister Celestia, and her departing words had simply been 'I love you'. Now, after so long, Nightmare Moon's heart longs for its other half; and thus, she has brought Celestia back from the far away, magically void lands she cast her to so long ago. Now, she wonders if her sister will ever find it in her heart to forgive her for what she's done, and if their lives together can ever resume as they once had.

Takes place 300 years before when Luna would have returned from her banishment to the moon, and takes place in a universe where Nightmare Moon was never banished in the first place.

TVTropes Page!
Thanks everyone for getting the story to the feature box! (12/10/16)
This is now my 1st story to have broken 200 likes! Thank you all so much!
SPOILERS IN THE COMMENTS

One night, an amazing display lit up the sky over Ponyville. A comet, brighter than any in living memory, was making its way through the sea of stars. The residents of the town gathered en masse to witness the spectacle. As was the tradition for such an occasion, many ponies made a wish on the celestial body, hoping that maybe, just maybe, some of them might come true...

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

Legends tell of the lost land of Equestria, once the home of all ponies. It is said that the Fire of Friendship was born there, and that the land was ruled over by four beings with brilliant souls and powerful magic. Gone are the glory days now. In this ruined world there are only mindless undead, ravenous changelings, and prowling, demonic beasts. The bonfires that keep the peace in the lands beyond Equestria are failing, and as the Fire fades, so too does the strength of nations.

Yet, perhaps there may still be hope. Perhaps, somewhere in the heart of that forsaken kingdom, there may still be a way to break this curse.

A Dark Souls crossover. Expect pain and misery.

Part of the Borderworld.

Twilight Sparkle has always been known to forgive easily. Many of the worst threats to Equestria have gone unchecked after Twilight forgave them for their actions. But when Starlight Glimmer, a former enemy of Equestria, causes a major accident that endangers lives, Princess Celestia has no choice but to review and approve a plan to implement a checks and balances system against former antagonists—the Reformed Antagonist Regulation Act.

The introduction of RARA splits the Mane Six, and many Equestrians, into two factions. Supporting a former villain's right to choose their own destinies is Princess Twilight Sparkle. Supporting a system of accountability and a fail-safe for potential relapse is Twilight's former friend, Moon Dancer.

Friendships are tested, loyalties are questioned and switched, revenge burns in the air, and all the while, a new threat pulls strings in the background, ready to destabilize Twilight and her friends' bonds forever.

Based on "Captain America: Civil War".

Cover art by the amazing arcanelexicon!

Now with its own TVTROPES PAGE!

[Third Person] Alternating Perspectives [Equisverse Era 2]
Forty Two years after the return of Princess Luna, and twenty five years after the Elements of Harmony were broken, Equestria has entered a new age. The Bearers were forced to adapt, to change, and discover new ways to continue to keep Equestria safe. Thanks to the tools, weapons, and spells the Bearers have come to use over the years, Equestria, once famous for rejecting the majority of the world’s technological advances in favor of magic, has come to embrace the mechanical and the arcane in equal measure.

These changes echoed across Equestria, and traditions began to change as the average pony sought to do their part. Many by taking up arms to protect Equestria themselves as adventurers, wandering heroes, or vigilantes. Being a hero is no longer something a lucky (or unfortunate) few have to do on occasion. It’s a job. One which pays well. One which is extremely dangerous. One which might mean you only have to work one day a month. Or that you only go to work once, if you lucky (or very unlucky).

It’s a job that Orange Sherbert wants. But not for the money. Her grandparents did it before the new age dawned, as did her parents, aunts, uncles, their friends, and even acquaintances. Being a hero is her family’s business, but Sherbert is no hero.

She’s young, inexperienced, unskilled, and immature. But she knows this. She knows it and wants to become someone she feels is worthy of her family’s legacy. Someone who can save any day which needs saving. Someone who can right wrongs, and to destroy that which should not be.

To accomplish her goal, Orange Sherbet has chosen to travel to the country of Neighpone and train in the art of ninjitsu. To acquire skills, discipline, and personal growth all at once. But just what will she have to endure to achieve her goals after entering the ancient doors of Kōmoriakademī, Bat’s Academy.

Featured on Sunday, August 13, 2017 at 5:47:42 AM
And again on Friday, August 25, 2017 at 9:29:01 AM
And again on Tuesday, September 12, 2017 at 9:03:22 AM
And yet again on Saturday, September 16, 2017 at 6:12:59 AM

This story begins Series 2 of the Equisverse. Prior cannon is unnecessary.

A few hours after saving the Friendship Games, Sunset Shimmer and her good friend Twilight Sparkle are relaxing on the CHS lawn. The two are so close that Sunset finally feels like she can ask a question that's been on her mind for a while.

"Can I go home?"

Season 5 Finale-related.
So many realities. So many horrible futures. But in yet another alternate timeline, Twilight finds herself in the Golden Oak Library with the Princess of Friendship: Sunset Shimmer. Rather than the awful futures she's seen before, she now finds herself in a timeline that actually seems nice. But that means she has a tough decision to make...

-Awesome cover art used with permission from the amazingly talented Huussii (Teemu Husso).
-Based on an idea from Silver Quill.
-Featured as of 12/8/15! Thank you to all the readers!
-Editors: GenerousGhibli and E3gner