After Nightmare Night, Luna invites Twilight to tea, and they start spending more time together. Princess Celestia teases Luna about it sometimes.

Twilight Sparkle has been betrayed by Celestia, all her friends brutally killed in front of her eyes after the young unicorn woke up one morning with wings. Celestia had realized that Twilight had been chosen by the Elements of Harmony to replace Luna and herself as the leading force of Equestria, and correctly surmised that the other Elements would have followed shortly after and become a united force the current princesses couldn’t hope to defeat if they chose to contest their position for the throne. Even though Twilight doesn't want to acknowledge her destiny as Equestria's next chosen ruler, the new alicorn cannot let the tyrants she has now seen Celestia and Luna really are remain in power.
Armed with only the Elements of Harmony and her burning rage, Twilight sets out to avenge her friends and free Equestria from Celestia and Luna's tyranny.
The fate of Equestria, as well as the balance of this entire universe, hinges on Twilight's success.

When filly Twilight asks Celestia to tell her a bedtime story, the Princess is not prepared for the many memories that float to the surface once she is asked this. She mainly remembers a small filly just like Twilight, who also asked for bedtime stories many years ago.

After browsing the magic books in the late afternoon Princess Twilight accidentally recites a spell that turns her back into a filly except with her new found ascension; she has now been turned into an Alicorn filly. Now the princesses of the sun and moon have to take care of her...for however long that is. Can they find a cure or will Twilight start her life over again?

I am sorry for any similarities to any other stories, I can assure you these are all my ideas.

Princess Celestia has been the sole ruler of Equestria for more than a thousand years. Over those years, she gradually drifted apart from those ponies over whom she watched tirelessly. But now that Princess Luna has returned, and has begun to share the burdens of rule that Celestia has had to carry alone for so long, she is forced to come to grips with the isolation and loneliness that she has brought upon herself. Having kept herself distant from her subjects for so long, she turns to the pony whose friendly nature has already helped to save Equestria on multiple occasions for help and comfort.

Even the most common sayings can lead into larger things. Twilight sends a letter to Celestia confronting her unjustly founded fears of Twilight's immortality years after the passing of her last friend.

Based off an idea conceived early this morning. Approx 1 hour went into this. Finally have a proper counter to the Twilight Sadfics out there.

How can this be true? When the sun was later in rising than it should have been, Princess Luna became concerned for her older sister. No pony had seen her since Princess Cadance and Shining Armor's reception had ended late the night before. However when Luna went to urge the moon down hoping to nudge Celestia into completing the cycle, her magic brushed against an aura she had hoped and prayed to never glimpse again.

Had her inability to protect the ponies she cares so deeply for, driven Princess Celestia to do... The unthinkable?

Twilight ventures out into the mountains to see a once-in-a-lifetime event. Disappointed by her friends not coming with her, Twilight crosses paths with a kindred spirit.

EDIT: Please note, the original story will not be continued, please refer to this blog post for updates on the future of the project.

Twilight Sparkle has never felt so lonely. After what happened at her brother’s wedding rehearsal she can’t but question her friends’ worth, and once she starts doubting one part of her life, second thoughts about the rest soon follow.

Some dilemmas can’t be solved alone, but luckily for her they don’t have to be as she meets an unusual new friend who encourages her to "go another route" and help her purge the very sin that Twilight experienced from this world.

Now, she works towards a new goal. Pretending nothing had changed she goes on with her everyday life, but secretly gathers new allies for her cause. Finding them is however just the beginning.

This is an alternate storyline that takes place during season 3, starting from the season 2 finale. This story assumes you are caught up with the show at these points. If you have not watched the season 2 finale or season 3, I suggest you watch those or at least read a summery before reading this story. This project ignores season 4 and Rainbow Rocks.

Special thanks to Corwin Freiss, former co-author of the original story.

The Great Tragedy. The night an era ended. The night the skies stopped turning. The night the Canterlot palace, along with all of its occupants, was utterly obliterated.
Nopony knows how it was done or by whom. But they do know that one unicorn stood at the center of that calamitous explosion, and they know that Twilight Sparkle survived where two immortals had perished.
Twilight awakens in a world a shadow of its former self, abruptly thrust into the fallout of a disaster she remembers nothing of. Faced with a foe that is perhaps more familiar than she might realize, Twilight must find a way to restore her broken world and carry on the legacy of her beloved princesses.

Huge thanks to my proofreaders Some Person (chapter 1-12) and RazerWrites (chapter 12-14). The story would have been much worse off without them.