Fourteen authors, one story. I foresee precisely zero problems.

This is the culmination of a round-robin event in which a whole bunch of neato folks whose words you may have read before wrote a chapter each in one big story, with the proviso that they were only allowed to see the preceding chapter. This was totally a cool idea, like, a year ago.

This is the story that they wrote, and these are the people who wrote it:

Arcainum
Blueshift
Zay-el
Alexstrazsa
Ninestempest
Lucky Dreams
Obselescence
Whatever Rusty's Fimfic Name Is
Ponydora Prancypants
Cold in Gardez
Eakin
Wanderer D
Dawn Scroll
Pen Stroke

There are no elephants.

This story is a sequel to Only Got 100 Years To Live

Celestia has dropped a bombshell on Twilight. Her, growing wings? How can a normal--well no, she's no longer a normal unicorn: Normal unicorns get old; she hasn't.

What is she, then?

This story is a sequel to A Stitch in Time

Having discovered the message left for her by Star Swirl the Bearded in the distant past, Twilight once again finds herself caught up in the middle of a struggle against forces far greater than herself. In order to even stand a chance she'll need to travel further and wider than she ever has, and forge some unlikely alliances with old enemies. All to bring down the powers that have manipulated and shaped her entire life, and retake control of her own future.

The conclusion of the Time Loop Trilogy, which began with Hard Reset
Available in Spanish thanks to dgs1993
Series TV Tropes page

Sundrop's friends are under a lot of pressure. She'll do her best to put them at ease in spite of their professional struggles, their romantic worries, and their dastardly schemes to cast down the Princess of the Sun and reign over the blighted wasteland that was once Equestria. After all, that's what friends are for.

When Twilight is attacked and nearly killed by a madpony claiming to be her brother, she, the Princesses, and the rest of the Elements of Harmony find themselves saddled with a shellshocked soldier who would like nothing less than to end her life. While they help him adjust to normal life, he makes his story known - and what he claims causes them no end of worry.

Luna starts up a Judge-Judy-like show. But, as time goes on she slowly starts to waste away from some unknown illness. Stubborn as she is, she won't allow it to keep her off the throne dealing with her duties as Princess. Will Equestria watch as she wastes away to nothing, on live television?

There's a lot more going around Fluttershy's cottage than anypony knew. But it might just be time for it to be exposed... or not?

Equestria is a nation on the edge of disaster after the devastation caused by the Lunar Rebellion. Beset on all sides by nefarious enemies, vicious foreign invaders, insane Lunar cultists, malicious fey, and diabolical conspirators all threaten Equestria’s borders and stability. Midnight Sparkle, daughter of Archmagus Sunbeam Sparkle and herself a newly minted Magus of Equestria, soon finds herself embroiled in the chaos surrounding her homeland. But what hope does a single unicorn have against so many overwhelming threats?

A chronological sequel to The Lunar Rebellion.

Training Session
We all knew Twilight Sparkle was a powerful sorceress, but none of us had ever realised just how powerful she truly was. It is no underestimation if somepony said that she’d be able to challenge an immortal to a battle and come out as the victor. The possibility was there, of that there was no doubt, the only thing that was needed for her to actually defeat an immortal, such as myself, was for her to realise her full potential, for her to realise just how much power was stored in that small body of hers

Once, I was alone.

I felt neither sorrow nor joy at this. The presence or absence of others meant nothing to me. The universe moved in silence, and I drifted in its flow.

Then came the song.