Celestia had a niece once, not an adopted niece like Cadance, an actual biological niece, the daughter of Princess Luna. Sadly when Luna became Nightmare Moon her daughter took her mothers side and led the their forces against Celestia.

Princess Twilight was killed during that battle, or so history tells us...

Featured on the 11/10/2015! Thanks so much!

After a week of recovering from her return Princess Luna seeks to return what was lost by her banishment and find the one pony she cares for the most... her daughter.

This is a rewrite of my old story. I hope you like it

One cold autumn night, Twilight Sparkle lets in a pale and weary traveler into her home. When she accidentally discovers his dark secret, she is assaulted by him, and is left to die... When she woke up, she finds that she has been turned into a Vampire, an ancient enemy of Equestria last seen during Nightmare Moon's Rebellion. She now walks the thin line between life and death, sustained only by the blood of others.

Her friends now race against time to find a cure for this ancient curse, and stop the Vampire who infected Twilight, before he can create a new army of Vampires to conquer Equestria. Otherwise, Twilight will join the forces of evil and darkness, as the Bride for the Lord of Vampires. They have to work quickly, as every day passes, Twilight's thirst for her friends' blood increases...

Sort of sequel to Nightmare's Lullaby.

About a year after the defeat of Nightmare Moon, strange things are happening to Twilight. She starts to recieve strange dreams and something is... changing in her.

Twilight is again researching and that is going bite her right on the rear. She later finds herself in strange dream land. With a nightmarish "visitor".

Song fic. Takes place BEFORE the events of Friendship Is Magic.

After failing to stop Nightmare Moon in the ancient castle of the pony sisters, Twilight Sparkle is left with a scar that will permanently change the rest of her natural born life. As Twilight recovers from her ordeal, she finds that she is left with a difficult choice. Either live her life as a lie or sacrifice her innocence to protect the ones she loves. The path before her is set and she must now walk it alone. The sands of time continues ever onward, with everyone already trapped in its muddy depths. The sun will rise and the sun will fall. Waiting for its call, Death awaits for all.

Tags, rating, and characters can change.

Art created by:
http://cuteskitty.deviantart.com (top)
http://ventious.deviantart.com (bottom)

I just put the two together

It is the thousandth year since Nightmare Moon's banishment and she has returned. When the battle with Nightmare Moon goes awry, Twilight's friends and family must cope with the destruction left in Nightmare's wake.

Note: This story is based off of the picture giuliabeck's You Are Mine and Sparkle No More.

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!

Princess Luna has returned to Equestria and made peace with the conditions that led to her dismissal, but despite a thousand years of progress, ponies still shun the night and seek refuge in the sun. Refusing to allow herself to fall into the same pattern that brought on the fury of Nightmare moon a thousand years earlier, Luna seeks advice in Twilight, and in turn explains to her the true origins of the land of Equestria.

Nightmare Moon has won, and the world has been shrouded in eternal night. But hope still lives. The land of Equestria is currently divided between the armies of the usurper and those of the Dawn Militia. However, the greatest danger to the rebellion may not be the dreaded Mare of the Moon, but her lieutenant, Eclipse–formerly known as Twilight Sparkle.