The summer sun celebration is about to begin and Nightmare Moon is soon to be released from her lunar prison. In a world without Twilight Sparkle, how would Nightmare Moon be defeated and what will become of Ponyville?
Featured 9/1/2015 for a few hours Even got a screenshot of it.

Luna is through with Celestia making excuses for why ponies don't show her the love and admiration she deserves as co-ruler of all Equestria.

But when a towering monster appears and tells Luna that she can bring her sister to heel and be properly appreciated, Luna remains wary. She is no fool like Sombra, to fall prey to the darkness.

But this "Nightmare Moon" knows too much. Who is she? Why does she bear Luna's mark? And why is she so confident about the course the future will take?

There is now a Spanish translation of this story, courtesy of Spaniard Kiwi

Princess Luna has tasked herself with protecting the fillies and colts of Equestria. She loves them too deeply to leave them alone after Discord's rule. But she has to get her sister's approval.

For almost a thousand years, the immortal Nightmare Moon has reigned over Equestria as Empress. To the average pony, Nightmare Moon is an overarching enigma whose rule is absolute and whose wrath is terrible. But to Twilight Sparkle, who as an orphan has never known her parents, the Empress is something else entirely. When the young unicorn is brought under the royal wing as an apprentice, she learns a great deal more about the supposed tyrant than she ever knew. But as Twilight is introduced to life with her new mentor, she is thrust into a world of political intrigue, conspiracies and secrets. Secrets that were never meant to be revealed. As allies and enemies plot against the very peace of the nation, will Twilight fall prey to the perils of her new position? Or will she prosper and find in Nightmare Moon the mother she never had?

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My eternal gratitude to my editor, LordOfTheWrongs, without whom Night's Favoured Child would not be the story it is today.

Now with added TVtropes!

Unsettling dreams are starting to worry Princess Luna. She is positive these dreams hold an ominous portent for all of Equestria, but there is only one stallion who knows for certain the answers she seeks. King Sombra has been imprisoned again in Shadow since his defeat and the shattering of his body, but he is no less cunning and ruthless. And as Luna tries to interrogate him over time, she finds there is a softer side to the unicorn king, one nopony has seen before. But Celestia fears for her younger sister, warning Luna against Sombra's advances. Is the once-tyrant truly starting to court Princess Luna...or is she simply being used as a pawn in his plans to regain power?
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Cover art by the amazing MickeyMonster, who has permitted me use of it for this fanfiction, as this image inspired me to write this story in the first place.
Edited and proofread by my girls TheOneBehindYou and LabyrinthineMind.

8tracks playlist: https://8tracks.com/yoru-the-rogue/lingering-shadows

Celestia had a problem. Somepony wrote a novel about Nightmare Moon's rebellion. This made Luna quite unhappy, and unfortunately for her sister, Luna has not yet gotten the hang of modern traditions like freedom of speech, the abolition of the death penalty, and not bothering Princess Celestia when she's trying to sleep.

Fortunately, Celestia also had a faithful student, one who is now a Princess with an ill-defined portfolio and perfectly capable of dispensing justice by the laws of both today and one thousand years ago.

Now Twilight Sparkle has a problem.

(Title image hacked together from vectors by Martinnus1, Hawk9mm, and Paulie15.)

All of Equestria is united in celebration for the return of their beloved Princess Nightmare Moon. But when Celestia and everypony else recieve her she's skeletally starved, filthy, and very nearly dead. Meanwhile, while everypony's eye is turned, a lusty Blueblood pursues Twilight Sparkle, intent on adding her bloodline to his own so his family might step closer to godhood. (Alternate Universe, there never was a Princess Luna)

Twilight Sparkle has too much magic, and it will take her decades to learn to control it. Her spectacular loss of control during her entrance exam only proves that fact. She is a danger to herself and others.

After Sunset Shimmer’s disappearance, Princess Celestia needs a new student to bear The Element of Magic to defeat Nightmare Moon. With all of Equestria at stake, Twilight Sparkle…is not the pony she needs.

Princess Celestia seals Twilight Sparkle’s magic with the distant promise of one day teaching her.

But there are two diarchs of Equestria. Amidst a lucid dream, an offer is made.

“Hello, Twilight. Would you like to be my student?”

Cover art provided by Lafiir.

Princess Luna has always avoided the subject of the number of thrones in the Canterlot royal throne room. But when a filly asks the weighted question to her face, Luna decides to answer – and finds that some recent events have changed what she believes that answer to be.

Beneficial, but not necessary, to have seen the Season 5 episode 'Do Princesses Dream of Magic Sheep?' before reading this.

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Now featuring two Dramatic Readings!
Dr. Wolf: https://www.youtube.com/watch?time_continue=1&v=rep0KyxVoEc&feature=emb_logo
Big Ash: https://www.youtube.com/watch?v=XlQdOjZd8og&feature=emb_logo

Trying to patrol the dreams of every pony in Equestria can be stressful. To ease her burden, Luna retools the Tantabus to turn nightmares into good dreams instead of vice versa. Aware of her mistakes from last time, she tests it out thoroughly, making sure there are no unexpected behaviors. And as far as she can tell, there are none.

Except that it's started calling her "Mom".

Faced with the prospect of possibly creating life, Luna seeks out Twilight's advice and assistance. With a little luck, they can get this all sorted out before the sun rises.