This story is a sequel to The Affection of Princess Nightmare Moon

Sequel to "The Return of Princess Nightmare Moon" and "The Affection of Princess Nightmare Moon".

An unknown villain tries to pit Princess Nightmare Moon and Queen Chrysalis into another battle. Nurse Bandaid is caught in the middle. All the while Celestia is distracted with personal matters and Court Vizier Twilight Sparkle must try to run Canterlot on her own. Discord is unaccounted for, but he loves his sisters dearly. Who is pulling the strings of conflict between the five Children of Faust?

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)
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SPOILERS IN THE COMMENTS

Twilight was always fated to be the savior of Equestria, along with her friends. But fate can be so easily altered. What happens in one alternate realm when instead of marrying a unicorn, Twilight's mother had instead married an earth pony, resulting in her daughter being hornless? Without her magic, Twilight's future and destiny are far less certain, as is the destiny of all of Equestria.

However, destiny is not so easily set off course. When the princess of the night returns, can one little earth pony hope to be the one to help her damaged heart?

Now with a TV tropes page! Thanks to redandready45.

Inspired by KnightMysterio's take on the Nightmare-Timeline in the story Context

The Princess of the Sun has fallen, the Queen of the Night now takes her place.

To the surprise of many, Nightmare Moon isn't evil. Or insane for that matter. She is attempting to be a queen that can properly rule a nation she has not seen in a thousand years. Some will try to aide her, others will attempt to thwart her, but the Wrath of the Night is something not to take lightly.

However, Celestia may have made a mistake in letting Luna fade from history and the only mention of Nightmare Moon become a demonized fable- no one would take that very well in her place.

Features: Twilight reluctantly helping a Sane and Noble NMM, curious and confused guards, and ponies being reminded of their lost history.

In a jealous rage, Princess Luna rebelled against her sister, embracing the darkness in herself readily. The newly transformed Nightmare Moon and Princess Celestia fought above the Castle of the Everfree; after an arduous battle, Celestia lay bested by the sister she'd fought so hard to keep under control. With no other choice available, Princess Celestia wielded the Elements of Harmony.

Now, Nightmare Moon rules over a dark Equestria. She finally has the power of which she'd dreamed for so long.

She only wishes she didn't feel so wrong inside.

Story image is vectored out of this one and this one.

In another timeline, created by the meddling of Starlight Glimmer, Nightmare Moon's plot to return and overthrow Princess Celestia has succeeded. Now Rarity is at her mercy, and finds that the lonely banished princess has taken a liking to her beauty and fighting spirit. Rarity must fight with every ounce of her mental prowess to retain her independence and her sanity.

Rated T for torture and suggestive dialogue

Sequel to The Return of Princess Nightmare Moon! After having made a full medical recovery Princess Nightmare Moon tries her hoof at wooing one of her subjects, Nurse Bandaid. Meanwhile, Chrysalis returns to feed on Celestia, still vying for the position of godhood. (Coverart by Mewaponny!)

It quickly became clear to Nightmare Moon that she needs sunlight, whether she likes it or not. Rarity, on the other hoof, doesn't understand; if she's the good guy in her and her sister's age long feud, how come she- or anybody -would need such a dreadful thing?

Yet bringing it up to her leader was a mistake.

Nightmare Moon is deathly sick, fallen ill by only the hooves of her banished sister. Twilight knows that her mentor is running out of time, however much she tries to convince herself otherwise. But how far is she willing to go?

Idea by Rated Ponystar

Preread by Curious Quill

Edited by Swan Song

The Crystal Empire finds itself in the middle of property dispute when a representative from the north comes in, claiming that Equestria doesn't own the land. Who does? Canada, apparently.

Alternate universe tag because this is a world with Canada in it. Random tag because it's a bit silly.
Written mostly for the group Canadance is Best Pony.