This story is a sequel to CRISIS: A Royal Affair

A mysterious portal appears in the Everfree Forest one afternoon, and Twilight Sparkle and her friends are sent to investigate. The portal transports them to another Equestria, one full of evil and darkness, where they have to fight to survive on the long journey home. A pony named Tick Tock, a guardian of this new world from forces of chaotic magic, offers to find a way to take them home. They make other new friends along the way, but also new enemies, primarily six evil counterparts out for blood.

The central story of the CRISIS-verse. This story takes place during Season 3 of canon, before the Keep Calm and Flutter On episode.

Thanks to Devnator, BeeAre, and The Living Couch who assisted with editing and as creative consultants. Cover art by Starlight Spark.

Check out the TVTropes page, maybe give it some love.

Principal Celestia always has wings in her dreams.

They got her into trouble, once. She let herself believe that they meant she was an angel. Then she grew up, and learned some hard lessons about what being an angel really required.

Now six magical girls have just fought a demon in front of her school. And her phantom wings are itching.

Her life is turning upside down ... and she hasn't even heard about Equestria yet.

Rated Highly Recommended (Top 15 Stories Sitewide) by Present Perfect! "It's f**king flawless, you guys. … The first [6]00-word chapter by itself is a masterpiece."

"Literally the single best EqG story on the site." —Professor Plum
"[One] of the best stories on the site, period." —Pearple Prose
"One of my all-time favorite pieces of fanfiction." –brokenimage321
"My favorite EQG fic of absolute all." -Skywriter

Rated Why Haven't You Read This Yet? by PaulAsaran! "I might have been skeptical going in, but horizon knocked it out of the park."

Rated 5/5 by csquared08! "The opening chapter here was truly something else. ... Then I hit the end of chapter 3. holy crap."

Rated ★★★★ by Louder Yay! "A lesser writer might have made a horrible, cliché-ridden mess of this story, but fortunately horizon is not a lesser writer. For a start, it's by some distance the best portrayal of the human world's Celestia I've read."

Third place in the "Under the Sun" June 2017 Writeoff!  (That first draft has been revised and expanded for FIMFiction.) Praise for the Writeoff version:

"Holy cow ... That's how you write an EqG fanfic! You captured the heart and SOUL of this/your version of Principal Celestia, wrapped it up in bi-universal consistency, and sold me on an idea of redemption I didn't even know I needed." —Xepher

"This is gorgeous. A thorough, exhaustive, incredibly moving portrait of a character who I don't think I've ever seen get quite this much development or attention." —Posh

"This is actually, after all these years, an original take on a story on Luna's banishment. If that's not something to be celebrated I don't know what is." —Quill Scratch, Radio Writeoff

MORE REVIEWER PRAISE: Rated "Definitely Read" by Super Trampoline! Reviewed by City of Doors! Reviewed by Titanium Dragon! Featured on Equestria Daily!

Rated T for brief cursing and alcohol use. Cover art by Seniloko, used under Creative Commons license.

Translations:

中文 - 行政天使

The newly ascended Alicorn of Love is learning to use her newfound powers, including the ability to see emotions. When Cadance looks at Princess Celestia, though, she's sure that she must be doing something wrong, because what she sees makes no sense at all...

A brief story about feeling depressed.

And a continuation of my habit of naming stories after songs which may or may not actually be relevant.

Editing by TheMaskedFerret, inspiration by real life.

Princess Flurry Heart has been a little kidnapped. And only Shining Armor and Princess Cadance can save—roughly three quarters of—her.

(A study on fairytales.)

Proofread by Neko Majin C.

Twilight and Spike return to the Castle of the Two Sisters, only to find that their previous foray into its depths may not be what they remember.

What does a Princess do when she is immortal, ruler of a kingdom and utterly alone? When there is no one to call your own or friend to turn to. This is the problem facing Princess Celestia. She has no real friends except her younger sister Luna. When that isn't enough, one event will change her life forever. Come join Celestia as she finds what she is longing for in the most unlikely of places.

The Royal Ceremonial Headdress takes ages to fix up. Just ages. Plenty of time to chat about love, and time, and those big steel cups they serve alongside your milkshake.

Audiobook version: KwirkyJ

Now with a Spanish translation by Spaniard Kiwi!

Since time immemorial, the Grand Council of Immortals has watched over all aspects of Equestrian life. They determine the destinies of all things on the mortal plane, both great and small. They convene once every one hundred years, and the Immortal who plays host to the gathering is permitted one request.

This century, it is Princess Celestia who will host the meeting... and who will ask for an unprecedented gift be granted to the newest alicorn princess.

Inspired by the Rankin/Bass adaptation of the Life and Adventures of Santa Claus.

Excellent live reading by Goombasa.

Now that Discord's reformed and friends with a princess and her entourage, he's decided it's time to assimilate himself into pony culture. With Nightmare Night coming up, Discord decides to get into the spirit of things by opening a costume shop in Ponyville. His amazing costumes soon become the talk of the town, and Nightmare Night fever is stronger than ever...

...but is Discord about to play the ultimate Nightmare Night prank on an unsuspecting Ponyville?

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!