Twilight Sparkle finds a book in the library.

Twilight Sparkle reads aforementioned book.

Twilight Sparkle's life is thrown upside down, her view of her teacher shattered, and her friends pitted against each other.

Everything will return to normal.

One of these statements is false.

Twilight Sparkle never meant to do anything wrong. But then again, all magical mistakes are caused by ponies who have no idea what happened. That's why they're called mistakes. The only difference with Twilight's mistake is that it accidentally sort of turned her into Princess Celestia. And now she doesn't know how to change back.

The path to adulthood is one riddled with pitfalls and obstacles, and it's no easier weighed down by everypony's expectations. Octavia has to deal with resentful teachers, impatient parents, school pageants, bullies, rivalries, and broken bow strings if she ever wants to make it as a respected musician. If she can even be sure that's what she wants. Luckily for her, she's always had one pony who'll stick by her through thick and thin, and maybe make a little trouble herself.

Twilight has never been interested in romance, at least not for herself. But a rather flustered epiphany changes that and now she must try and work out what it is, exactly, that she feels for her athletic friend, Rainbow Dash. A friend she's convinced would never like her back in the same way.

It's going to take a bit of courage to measure the degree of her affections and to test the waters... but perhaps it'll be worth it.

This story is a sequel to What if: Rarity from The Three Sisters met with Chrysalis

Choosing whether or not to visit Chrysalis has been bugging Rarity for a week since receiving an invitation to do so. But there seems to be trouble brewing in the Hive and Rarity now has little time to act. Either way, her family's future rests in her hooves.

Now with a TV Tropes page! Warning: Will Contain spoilers.

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...

Twilight is invited to Canterlot to compete with some of the greatest magicians in the world for the Moonstone Cup, a prestigious award for the most powerful and skillful magicians, unicorn and otherwise. Can she win? What sort of competition will she face?

Awesome cover image was taken from NoOneBahtim

On a dark night filled with even darker magics, an insane cult attempts to give Nightmare Moon a body and life of her own, utterly separate from Princess Luna. But, when the spell is interrupted by Celestia, something unexpected is created.

Now, a little black alicorn filly named Nyx finds herself living under the care of Twilight Sparkle, only to be haunted by memories and emotions from her past. Is she Nightmare Moon reborn or is she simply a doppelganger with a soul and mind of her own? Can Twilight Sparkle protect Nyx from those who refuse to see past her dragon eyes and black coat?

Or, will Nyx be forced to inherit the sins that may not even be hers and become the greatest evil Equestria has ever known?

Orphaned from birth, with only the memories of a soft touch and gentle voice to remember her by, Twilight yearns for her mother. What pony wouldn't want to know why they were abandoned, why they were left to be found by the Princess of the Sun herself.

That was nearly two decades ago though. Twilight was older now, and hopefully wiser. She is happy with her two best friends, Cadance and Shining Armor. They are like family to her, the brother and sister she never could have. Though dreams still haunt the young mare, dreams of lullabies and tender kisses, she has moved on.

The personal servant to the Princess of Helios, the land of the Sun, Twilight enjoyed both rank, and knowledge. But it also means that when Princess Luna comes to visit her old friend, Twilight is given the task of tending her. The Princess has come in search of marriage, at the behest of her ruling Council. They demand an heir to ward off the potentially catastrophic attacks of the neighboring dragons.

Soon, Twilight will be tested and tried. She will be given the a choice between the life she has known, and the duty she is sworn to. But never, not once, will she forget.

For who can stop loving their mother.

Luna's isolation and difficult reentry into Equestrian life has left her without the confidence to communicate with the ponies around her. Especially the one pony she most wants to talk to. Celestia is angry, Twilight is upset and it's all her fault. Then she has an idea... She'll invite Twilight into her dreams. What could possibly go wrong?