This story is a sequel to Lines and Webs

For four long years, Celestia's apprentice Twilight Sparkle, once a model pony and a hero among heroes, has waged a bitter and secret struggle with her onetime mentor. Though she works from the shadows, directing her forces from the Old Capitol in the Everfree Forest, Twilight Sparkle is unable to gain any advantage,

Likewise, Princess Celestia finds her once-faithful student far more cunning and elusive than she had anticipated, and even now searches for a way to bring Twilight Sparkle's rebellion to its knees.

It is a game of greys, of knives in the dark and of poisoned wine, where pawns are moved and traded and exchanged for greater advantage, all the while drawing both sides nearer to the conflict which shall tear Equestria in two.

At the center of this conflict is a new pawn, one who only wished to see the truth for herself. Drawn into a deadly game whose rules she does not understand, Sweetie Belle must learn to survive in a world where all is darkened, and nopony can be completely trusted.

Because when gods play chess, all pieces are expendable.

A nation will crumble, old enemies shall return in the most unexpected ways, and regardless of who is victorious, only one thing can be certain.

Nothing shall ever be the same.

Followed by Stormsinger.

Book III
Everything looks to be going well for Dusk. He has great friends, a good life and a mare he would give his heart to. It seems like, after all of this happiness, nothing could possibly go wrong and things can only get better.
But as he learns, things have to get worse before they get better. And they do, for after a thousand years trapped in stone, Discord is freed from his entrapment, to reign chaos over Equestria once more.
The only one not connected the Elements of Harmony, Dusk ends up being left behind for his own safety, seemingly useless in the fight. But that changes when Princess Luna sends him into the Everfree Forest, searching for something that might help them. Can he find this strange artifact, if it even exists? What exactly is it? What is this prophecy about?
Discord also starts to take an interest in him and soon, through the spirit's magic, Dusk must face his greatest challenge yet, an enemy thought to be non-existent: his darker side, created by the spirit of chaos.
Can Dusk survive and discover his destiny or will his darker self take over forever?
Cover again by the great Quillin Words. Thanks man!

Book V
It seems like a perfect day for a wedding. With the sun shining its brightest in the sky, birds singing their ballads in the trees and emotions running high, nopony could even begin to argue with that assessment. When Dusk and his friends are called in to help with the preparations, it looks like it could be even better. A time for celebration and for merriment.
Yet all of this is calm before a storm and it will be a great one. Underneath all the cake and the flowers and a gowns, a threat looms over the kingdom. A threat of invasion, which will soon be realised on this happy day. Sparked by greed and hatred, Chrysalis and her hive are coming, their numbers great and their sights set on conquest. First, Canterlot, then all of Equestria.
When they descend, it is the Elements of Harmony who must rise to defend their home. Dusk must take up arms against those who would do them harm. But after the scars that still plague his mind, can he bring himself to hurt another being, even an enemy? Will he be able to take up the banner and stand up to the Changelings or will he succumb to his lingering fears? And why can't he shake the feeling there might be something more to this, that his lurking foes might be orchestrating this?
All that is known is that Equestria will soon darken for a warring Dusk.
Cover done once more by the irrepressible Quillin Words.

This story is a sequel to The Best Night Ever

Final Arc - The Black Wedding
CH63 - If I Had a Heart
- The ponies of the Fourth Tribe are ascendant. Shining Armor hunts down his changeling "daughters," and even Lady Antimony won't get in his way. Meanwhile, high above the burning city of Canterlot, a long awaited reunion occurs, and Twilight confronts Alpha Brass and makes a final decision.

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It began with a mare from Ponyville and a time-looping Prince from Canterlot. This most unlikely union now stands at a crossroads: a ruthless changeling invasion; a conspiracy within the highest circles of the Equestrian aristocracy; a half dozen power hungry noblemares looking to become a Princess in all but name. With the prize of Canterlot and its Platinum Crown at stake, it falls to six Elements of Harmony to once again save not just Ponyville, but all of Equestria.

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TVtropes page is here: link

The prequel to TPC, "The Best Night Ever" is here. link
The side-story crossover with "Sweetie Belle Chronicles" is here. link

Someone out there made a playlist for Platinum Crown: Rarity, Blueblood and Chrysalis. Pretty sweet!
Wish I knew who, or even when they did it, though. I especially like the Chrysy playlist.
https://8tracks.com/explore/this_platinum_crown/hot/1

I've gotten some cool TPC related art done, too.
So Sweet and Tasty's TPC Cover Art
link
Thanks to Madmax for these two:
Rarity, Blueblood and Antimony
link
Dash and Ritterkreuz
link
The Terre Rare Founder - Lady Arsenic
link
Twilight and Alpha Brass Battle Duet
link

Twilight Sparkle broke time when she got her cutie mark. Now Twilight and Sparkle are sisters from another time. Twilight is hailed as the potentially greatest light magician of all time, and already has a reputation as a hero by the time she goes to Ponyville. This isn't her story, not primarily.

Sparkle is an orphan - her dark magic killed her parents. She lives with her brother in Canterlot's industrial sector because they can't afford anything better. She can't leave either. She's a natural dark mage; while Sparkle won't go mad like Sombra, her reputation is hardly any better. Worse, the law doesn't see her as a good pony.

The fact that the dead don't stay dead around her, or that Thorn - Spike's double - is an undead, soul-eating abomination, are other matters altogether.

(Also has some Slice-of-Life, but fimfiction tags won't let me put it with Adventure.)

Has an ask blog to go with it: Ask Sparkle and Thorn.
Also has a TvTropes page: Split Second Tropes.

Featured on EQD.

Cover art by Swirling Line.

This story is a sequel to The Irony of Applejack

Warning: this story is a sequel. Therefore, it is highly recommended that you read the prequel first before continuing!

Over half a year has passed since the changeling attack on Ponyville, and Applejack would like to think things have finally settled down. Much has changed for the young changeling, and all of Equestria in kind. The new district in Ponyville proves that, along with the town's many new residents.
But there is much the young queen does not yet know about being a changeling. Some things, she will learn, can be chosen, while others will be chosen for her. With new allies and enemies emerging all around her, Applejack must discover what it truly means to rule before the choice is taken from her forever, and the history of the changelings repeats itself, once again...

Image provided by Heilos.

This story is a sequel to Utaan

Rainbow Dash traverses the perils of the Dark Side of the world to reach the Midnight Armory.

Cover art by Dafaddah