For Celestia, life had rarely been better than it was now. Her sister had been returned to her, Discord was freed and subsequently defeated in record time, much to her private amusement, and her niece and her coltfriend had ideas of marriage in the not too distant future.

An event that would no doubt be yet another historical day in the rapid series as of late.

Yet, history is made even earlier than expected as Princess Celestia finds a strange letter in her room one night. Someone claiming to be the prince of an unheard of species is asking for Equestria's help. Making the dire situation described in the letter even more urgent is the warning it held.

Celestia and her fellow princesses are eager to meet the strange colt who has revealed his own mother's invasion plan of their kingdom to them in a bid to gain trust. Of all the ponies to meet this strange colt, however, it's one Raven Inkwell who will find her life turned the most upside down.

And by the end, she wouldn't have had it any other way as she comes to know Prince Anonymous of the Changelings.

This is an RGRE story starring (what should be) everyone's favorite mare, Raven Inkwell and a friendly changeling prince as they work to navigate politics and establish peace between two kingdoms.

This story is a sequel to Rider on the Storm

For the briefest of moments, Anonymous wielded absolute power. He single-handedly destroyed the city of Canterlot, laid waste to Ponyville, decimated the Everfree Forest, and came dangerously close to annihilating the very Tree of Harmony itself. And he had an absolutely fantastic time doing it.
Right up until he lost.
Now he's stuck as a statue under the watch of the princesses he tried to subjugate, awaiting the time he'll be locked away forever, with the key no doubt thrown into a volcano. But from the very beginning, Anonymous suspected that the shenanigans of the good guys would cost him his victory at the last moment, and so he laid plans with his most loyal of subjects—all former soldiers of the Storm King he betrayed to obtain his power—to arrange for his release should the opportunity arise.
Unfortunately, he wasn't counting on the ponies calling in help from a faraway land. Enter the Four Princes of Zebrica, all wielding the same exact power that Anonymous did, and knowing a thing or two about how to put bad apples like him away for good. This is made even worse by the sorry state of Anonymous's storm beast forces, having hit hard times in the months since his defeat.
But not all is lost for the petrified supervillain. Because in a rare twist of luck, the Princes just so happen to unknowingly bring with them a zebra criminal with his own dirty little secret. A secret that not only secures Anonymous's release from captivity, but just might be the start of a horrifying new partnership, and with it, the birth of a new force of evil.
And of course, with all that going on, there's always the matter of the nascent Legion of Doom, plotting to bring their own age of darkness to Equestria as well...

Takes place during the final two seasons of Friendship Is Magic. With a few alterations here and there, because I HATE THE ANTI-FIM I HATE THE ANTI-FIM :bread:
Reading Rider on the Storm is strongly advised if you want any idea of what the hell is happening in this story.

A thousand years ago in Equestria, Luna's frustration and desperation has been building for years and years as her social and political isolation grows, but just before Luna's jealousy and resentment can turn into murderous hatred against her sister, a new event triggars Luna's mental collapse and pushes her over the edge. When Luna by circumstance finds herself alone in Celestia's room she reads her sister's diary out of curiosity and discovers all of the disparaging criticism that Celestia has leveled at her over the years about how much of a nuisance Luna has been to her, but has been too polite to say directly to Luna's face.

Luna and Celestia had always supported and stuck with each other all their lives. Even when the common-ponies critisism and shunning of her was at its worst, the knowledge that her sister loved her kept Luna going. The realization that nopony, not even her own sister valued her or thought she was fit for the throne completely shattered whatever remained of her fragile psyche.

And so Luna just gave up...

She gave in...

If no one wanted her there...

Then she wouldn't stay there...

She would leave.

This story is a sequel to Rider on the Storm

Shortly after slipping out of Twilight's new school on account of it's boring lessons, the Young Six spend some quality time hanging out in the old Castle of the Two Sisters, deep in the Everfree Forest. With plenty of food provided by their friend Sandbar, they settle in for the night, swapping stories about their lives.
Unfortunately, one of Sandbar's stories involves the attack on Canterlot by the late Storm King.
This brings back some traumatic memories about Silverstream's own encounter with Anonymous - one of his commanders - during his separate attack on Mt. Aris, and how she only just barely managed to escape his clutches. And although Sandbar understands all too well what she's been through, the rest of her friends are in for quite a shock when they hear her recount the harrowing experience.

A little thing written in a few days to shake off some pretty severe writer's block, with the initial excuse of making it a Halloween special.
Takes place during the Season 8 premiere, School Daze.
Reading Rider on the Storm is strongly recommended if you want any idea about what's going on here. I'm told it's a fun read.