Derpy Hooves is secretly a changeling.

Nopony particularly notices, or cares.

(New 9/15/19: Spanish translation by Spaniard Kiwi! Thank you!)

This story is a sequel to Hard Reset

After the events of Hard Reset Twilight's life and mental well being are slowly returning to normal. Her recovery is cut short, though, when a letter arrives informing her that the time loop spell she cast is causing severe damage to space and time itself. In over her head, Twilight tries to summon anypony who will know how to fix it. The pony she gets is the last one she ever thought she would meet... and nothing like she expected him to be.

Available in Spanish thanks to dgs1993
Series TV Tropes page

Twilight isn't having a very good day. An experimental spell blew up in her face, an army of changelings is attacking Canterlot, and she just died. Yet somehow, it looks like it's going to keep going downhill from here.

Given the chance to correct what's gone wrong, Twilight swears she's going to fix all this even if it kills her. Which it will. Frequently.

Cover art by Pixel Prism
Spanish Translation
Series TV Tropes page

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!

Twilight wakes up with a serious head-ache caused by her horn spontaneously growing due to a sudden increase in her magical power. Nopony seems to have an answer for it, but it has attracted the attention of an unusually powerful militant foreign nation intent on her capture and execution. When a string of events lands Twilight before Celestia's father himself he tasks her and her newfound magic with tying up some loose ends he'd left behind long ago, ultimately connecting with this foreign nation's goals. With their powerful enemy baring down on Equestria, intent on taking it in a stranglehold, Twilight and her friends have little other choice than to travel the world and hunt for the rest of Celestia's family and end several thousands of years worth of feuding to prevent the war coming to Equestria before they themselves are caught.

Image Picture by Lostzilla of DeviantArt.
(find him yourselves)

Ech is a whiny bitch, but he helped edit a little I guess. (you too bats)

"My name is Lyra Heartstrings, and you will not remember me. You won't even remember this conversation. Just like with everypony else I've ever met, everything I do or say will be forgotten. Every letter I've written will appear blank; every piece of evidence I've left behind will end up missing. I'm stuck here in Ponyville because of the same curse that has made me so forgettable. Still, that doesn't stop me from doing the one thing that I love: making music. If my melodies find their way into your heart, then there is still hope for me. If I can't prove that I exist, I can at least prove that my love for each and every one of you exists. Please, listen to my story, my symphony, for it is me."

Cover pic by Spotlight: askspotlight.tumblr.com

Exiled from Valhalla during a battle against an invader, Sleipnir finds himself in a strange world with no easy way home. But with the help of his new friend, Prince Blueblood, he'll adventure across Equestria in search of a way back to his own world... and along the way, make new friends and teach Blueblood what it means to be a hero.

This story is a sequel to Because Love Conquers All

Equestria has found peace, and Luna and her husband have been able to relax in what they fondly call the Looking Glass World. Everything they have hoped for seems to be coming true: they have friends, family, and Luna is soon to bear a child. But soon enough, the peace is broken as the two are given a mission that will take them to other layers of reality, and they will find themselves hunted by the machines of their worst nemesis as evil once more comes to their world.

Divided into two phases, the first phase tells the story of the strange and layered universe Luna and Scrivener are fighting to protect, while working to raise a child and take care of friends and family. The second phase tells of war on their world, and how nothing comes without a cost. Eventually, all questions are answered, all loose ends tied together, all riddles solved: simply read and allow the story to keep track of itself.

Phase I, Day: Honor, Duty and Family (Chapter 1 - Chapter 38): In which a child is born, explanations are given, friends are recovered... and enemies begin to make themselves known.

Phase II, Night: Ashes, Metal and Corruption (Chapter 39 - Chapter 75): In which Clockwork World begins its campaign in earnest, an impossible story comes to life, old enemies rise... and the Fates themselves conspire against Luna and her love.

A story that mixes together elements of sci-fi, romance, and fantasy. Action and adventure intertwine with darkness and hope that shines through even the deepest despair, in a world where everything seems complex and impossible... but all the answers are clear cut and simple.

The sixth and final story of the Nátta Edda, and the final story of the Iðavöll Trilogy.