A long-forgotten villain escapes from Tartaurus Prison, taking Discord's power with him! Can a motley band of opposites and former enemies work together long enough to save Equestria?

Cover Art provided by the amazing Gina at I AM PONY.

The Cutie Mark Crusaders have always lived in the now, getting what they think needs to be done as a soon as possible, executing their plans just so they can move on to the next one right away, not thinking about the consequences till they’re right there in their faces. But when an attempt to earn their cutie marks goes too far, Sweetie Belle and her friends must face a horrible reality that sends their world into darkness and fear. How will the truth be uncovered and what will be sacrificed to undo this nightmare?

Octavia Philharmonica is a desperate mare. Her involvement in the ill-fated "pony pokey" at the prestigious Grand Galloping Gala has left her blacklisted among the elite of Canterlot who form her clientele. Faced with the possibility of being evicted from her apartment for inability to pay rent she decides to take a temporary job at a local nightclub. Of course, she's never set hoof in a club before and has no idea what she's getting involved in . . .

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 reads about a way to view a pony's soul, to see everything about them laid bare. When she tries it on her friends, will she be able to look at them the same way again? Or will the secrets hidden in their hearts drive her away?

(Yes, I borrowed the idea of a "soulgaze" from The Dresden Files, because it's something that really fascinates me. It's not a crossover, just an idea.)

Now has a sequel!

It was just a normal day for Twilight Sparkle, and that's when she found an old book, a relic of Starswirl the Bearded. That's when it happened, that's when she became a Master, how Starswirl the Beared became her Servant, and why she must now engaged in a to-the-death battle royale against six other Master and Servant pairs – all in the name of some holy artifact with an incomprehensible power that must not fall into the wrong hooves.
A My Little Pony and Fate/Stay Night crossover, written to be comprehensible to those without any experience with Fate/Stay Night.

Authors: Stalin the stallion, Crushric
All art by Stalin The Stallion
Huge thanks to The Conflicted Writer

Rainbow Dash attends her hometown's Millennial Summer Sun Celebration, where she meets a peculiar pink pony. When a strange portal appears during the testing of Twilight Sparkle's latest invention, and pulls their new companion inside, the two friends give chase and embark on the most important adventure in all of history.

Equestria Daily | TVTropes

Nightmare Moon always had a backup plan if she ever were defeated; she would slowly regenerate herself and regain her power. The problem is she never expected to come back as a defenseless filly, or to return directly in front of the princesses. As punishment for her past crimes, Luna has given her a sentence far worse than being sent to the moon again. Nightmare Moon must move in with Twilight and report to Luna on the magic of friendship. She's not very happy about it.

By the way I am not trying to rip off Past Sins in any way. Nyx is NOT in this story, this will go in a completely different direction.

Spiders. Oh, how I hate spiders. And yet Luna insists on keeping one as a...pet.

Just a little fun story to keep my skills sharp, so don't expect it to last very long!

My name is Rainbow Dash and today I learned something new. I learned I'm actually a changeling. You'd think that would be something you would already know. I just learned it now when I saw my true self for the first time. How did I come to replace the real Rainbow Dash, and when? And why can't I remember it?