Canterlot... For centuries, Canterlot was the shining gem of Equestria, the pinnacle of pony society. Now, it’s a reminder, a bleak and monolithic warning to the world. 

Changed by the chemical and technological poisons that plague the mountain, an abomination of nature, I wander the greatest disaster Equestria has ever seen. 

... I will escape eventually, and when I do, I hope my friends still see me as Twilight Sparkle, and not the monster that hides among the ruins. 

Twilight Sparkle never was a Unicorn and she didn't even know it.
What happens when her true heritage comes to light? Will she willingly embrace it? Or will she be forced to?

Beware of spoilers in the comments!

Edited by uTTerAbsurdity, Zervziel, Stormwatch and Gwenio

Cover art by the talented Cartoonlion and colored by the equally talented Stormwatch, original can be found here

Click here for the Tvtropes page

As Twilight Sparkle awoke one morning from uneasy dreams, she found she had been turned into a changeling.

How has she become a changeling? How will she adapt? How will her friends respond? And what new terrors will her metamorphosis bring?

Cover image by the fantastic Carnifex... or Siansaar... I can't tell which. You can find more wonderful works here: http://siansaar.deviantart.com/

EDIT: Featured... nearing 1000 Favorites... multiple pages of comments (swoons)

Thanks for everything guys. I never expected this thing to get so popular. I need to rework the second chapter, but it looks like there's going to be a blue moon every Friday for a while yet. Thanks again for your support and please keep reading and reviewing!

EDIT2: I've updated the character list again, a little preview of the second story arc...

EDIT 3: Just doing a quick character update to account for changes made to the next Arc...

There was only one explanation. For all of it. All of the strange, erratic behavior. Her irrational fear of the sun. Her nocturnal habits of locking herself in in the dark and closing all the blinds. Wearing her sunglasses everywhere, even inside! It was time to invest in some silver, garlic, and a wooden stake.

A short trip to Canterlot with Rainbow Dash and Applejack is the perfect opportunity for Twilight to test out her new long-distance Teleportation spell. But a nasty cold dashes the hopes of a quick trip, and makes the spell disappear in smoke: instead of arriving in Canterlot, the three find themselves in the nearby Everfree Forest, and discover that their location is not the only thing that went wrong.

While Rainbow has exchanged her wings and tail for a straw blond tail, Applejack has acquired a rainbow tail as well as a pair of strong, blue wings.

While Twilight attempts to find a spell to return the body parts to their rightful owners, the others must attempt to deal with this situation... and with their changing feelings.

Nightmare Moon may have been defeated, but Princess Luna still struggles with her inner nightmares. It was so easy to give into the temptations of power the first time, now that she had a taste of it, can she give it up for good? Or will she return to her old ways and have to be banished again, this time forever?

Even in a world of love, there are those ponies who sleep alone, and go on their days alone. Where is the love, when it is all around you?

After Twilight Sparkle discovers a new book of pick-up-lines, she wants to bring her friends closer by complimenting them with cheesy lines.

And it does more than bring them closer...

Mood Wings - Observations on Pegasus Body Language.

When Twilight Sparkle finds this book, she discovers an entirely new field of research. The secrets of pegasus wings lie before her, and she insists on making her own observations on the matter.

How?

Field research, of course.

The supernatural: Ghosts, zombies, werewolves, spirits... vampires...

Twilight Sparkle always thought that the supernatural was just a bunch of superstitious nonsense, just some scary stories to tell around a campfire. She couldn't have been more wrong.

After an occult ritual gone horribly right, Twilight finds herself among the ranks of these so called 'myths', whether she likes it or not. Due to the same force that changed her, dark shadows have begun to spread across Equestria, bringing to life these ancient fairy tales. And Twilight might just be the only one that can stop them...

For better or for worse, Twilight has been changed. Will she embrace this dark gift and become the hero Equestria needs, or will she eventually succumb to temptation and become the very thing she fights?