For a thousand years, the continent of Equus, divided between the kingdoms of unicorns, pegasi, and earth ponies, has existed in relative harmony. Within the enchanted land of Lumen, Twilight Sparkle has become the newest member of Class Zero, the kingdom’s best and brightest students.

A series of disastrous events leads to the threat of an all-out war between the races with Class Zero at its heart. And with the conflict comes a bitter chill not even the sun can warm. Twilight and her new friends will have to give it their all to defend not just their land, but the entire world.

But it'll take more than just unicorns to stop the coming storm. Because if the three kingdoms can't work together to find harmony, there may not be a home left to fight for...

Amazing cover art by Multiversecruise!
Gloriously edited by Novel Idea, DrakeyC, Cyrano, and Corejo!
Featured on Equestria Daily

As Celestia's personal student, there was no doubt in Sunset Shimmer's mind that she was the most powerful Unicorn in Equestria. There was no spell she couldn't master, no lesson she couldn't learn...save for one.

Hoping to rectify the situation, Princess Celestia broke one of her own rules and unearthed Starswirl's Mirror, hoping that, by gazing into it, Sunset would see what she always wanted. Unfortunately, the plan worked a little TOO well, but not in the manner she hoped.

Cast out and believing herself betrayed by Celestia, a desperate Sunset decides to seek out her 'Hearts Desire' on the other side of the Mirror...to a place where she will learn the lessons Celestia so desperately wished for her to learn: that Friendship is Magic.

Princess Celestia conceals it well, in appearance and poise, but she is an old mare. A thousand years is a long time to dwell, and her's have been filled with laughter and tears, love and loss, achievement and regret.

With a fresh open book and quill, Twilight Sparkle endeavors to capture in some semblance the journey that Celestia, Queen of Equestria and Warden of the Sun, has trekked in her centuries.

But before Nightmare Moon, before Discord, and before the Crown; in the age when Equestria was little more than a patchwork of jealous princes vying for supremacy, there was a white pony.

Tall, strong, and mysterious, she'd creep from the wilds and realize a destiny forged in elder days. A terrible evil stirs after millennia of dormancy. Equestria needs a hero, and the Wanderer of the North will answer the call.

An epic work retelling the life of Celestia, expanding on the mythology created in De Surgente Cadenteque Alicornuum, but it's not necessary to have read it beforehand.

Cover image by my good friend Private Dangle.

Also with a TVTropes page here!

Sunset Shimmer, the most antisocial student at Canterlot High School. No one would guess that she's actually the mysterious vigilante, Blacksun. But what happens when someone enters her life and flips her world upside down by asking to be her friend.

Will Sunset, A.K.A. Blacksun, be able to save who she needs to save with this wants-to-be-friend wasting her precious time? Or will Sunset learn that she's the one who needs saving?

Throughout their journeys, Sunset will fight threats both in school and out of school. And along the way, maybe the two will find that they like each other more than friends? Or Sunset's become delusional.

Life had just settled down for Sunset and Twilight Shimmer. A child on the way, major choices to make, classes to choose for spring.

And then Celestia appoints her as her temporary replacement while she and Luna step down for a time. In the wake of this are whispers, riots, and mysterious slogans bearing a single word:

Entropy.

Continuity: Homecoming

Flash Sentry's world sucks. Maybe it's high time he left it.

(Indeed)

Cover Art by amalgamzaku aka mix-up

Every night Derpy tells her daughter, Dinky, a bedtime story. Dinky usually asks to hear one about the many decorations that are in Derpy's room as each one has a story behind it. Yet there was one that she was always a little reluctant to ask about for how out of place it seemed to be. A battleaxe hanging on the wall right over the bed.

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Humanized
Thanks to Mr101, Berry Punch, TheExhaustedBrony, and Timps for Pre-Reading
One-Shotober Story#4 10/4/2013

Sunset Shimmer ran through the mirror seeking two things: an escape from Celestia, and a way to get revenge. Meeting up with these strange creatures called "humans," she can say with confidence that she has accomplished the first of her tasks.

Now a student of Mahora Academy, Sunset, or Nichibotsu Hikaru as she's now called, must navigate the overly eccentric life of class 2-A, all the while keeping an eye out for any signs of magic. After all, how is she supposed to take her revenge without...

Wait, what do you mean their teacher is only ten years old!!!

(Familiarity with Mahou Sensei Negima is not required to understand this story, but it will definitely help.)
(Featured since June 26, 2018.)

Isolated from her friends and taken prisoner in the middle of a war, Twilight must deal with the very real dangers of being percieved as an enemy as well as the nightmares of her arrival on 'Earth'. Can she overcome her own fears and the fears of her captors? Will the wayward unicorn's assistance be a boon or a curse to the 'humans?' Most importantly, will she ever find her way home?

"In short, it's a story of friendship and plasma rifles, with the emphasis on the friendship. The characters are well written, the XCOM setting is fleshed out very well, and the story is compelling. If you love XCOM, you'll love the story, but even if you've never heard of it, it's more than worth giving the first 3 chapters a read.

There's excellent action later on, but the real strength lies in the collision between the friendly and naive world of Twilight Sparkle and the desperate world of humans fighting a losing war for survival and willing to do anything to turn the tide."

--Arzoo

(XCOM/FiM crossover)
(Cover art commissioned by a friend and created by the magnificent FoxInShadow!)
(Original cover art by the amazing Carnelian can be viewed here!)
(Gore tag for blood and some violence)
(Many thanks to the studius OminousTen, Arzoo, xXFluttershyForeverXx and finally Setokaiva for giving my rambles a once-over)
(Now with it's own TV Tropes page! Get to tropin' folks!)