Sombra may have been defeated after his attempt to retake the Crystal Empire, but he was not destroyed. He still lives, and now he seeks to work his way into the mind of Princess Twilight Sparkle. As she struggles with the implications of her new immortality, she finds less comfort in the wise words of Princess Celestia, and is drawn to the dark magic of a fallen king.

King Sombra is a lot of things if not patient, but even he has a point where things go from bitterly trapped to unbearably boring. Torture would be nice! If she had the guts to entertain him in the old fashion way. No such joy for him...just bored, alone and still dead set on his vengeance, even if it is unanswered for. Just endless waiting. Endless nothing. No freedom to even pace his confines. Just an endless, tormenting nothing...

And yet...

For the first time in over fifty years...

He heard a knock on the door...

(Mind blowing art by futuristicspacetiger )

Searching for any records King Sombra may have left behind, Twilight learned of the shadowy king's tragic past. However, she also discovered his horn, in which his mind and remaining power were contained. Determined to learn how to use his Dark Magic for Good, Twilight brought Sombra back to Ponyville with her. After all, what could he possibly do as a horn? ...Or will he stay that way?

Edited by Darth Vendar and Myrkur
Inspired by Issue #1 of FIENDship is Magic
Gore tag just to be safe.

Edit 06/15/23: Now in the top 2K stories on the site, by rating! Thank you all!

After his violent defeat, the former tyrant King Sombra has managed to claw his way back from the land of the dead and has returned to Equestria to seek revenge on Princess Celestia and the Elements of Harmony. However, the Emperor of Darkness is no fool. He knows that he cannot simply seek retribution on the Main Six or the Princess of Day, so he waits, gathering intel on his foes, learning of their weaknesses. When the time is right, he will strike. Can our heroes overcome King Sombra's plot for vengeance?

Sequel: The Return of the King

*Note: This story takes place in my official headcanon universe, not in the one for Shattering a Heart of Darkness

This story is a sequel to When Darkness Falls

King Sombra, the dark sorcerer and former ruler of the Crystal Empire, has been defeated by Twilight Sparkle and the other bearers of the Elements of Harmony, leaving him stripped of his magic and imprisoned deep below the surface of Canterlot Castle. There, he waits for his chance to take revenge against Princess Celestia and conquer Equestria, though his affection for both his long-lost daughter and the mare that he loves have him question everything that he knows. Can the shadow-pony learn forgiveness and mercy or will he let his deep-seated anger and desire for vengeance consume him?

*Takes place in my head-canon universe

This story is a sequel to Shattering a Heart of Darkness

After returning to the side of good and banishing a threat to Equestria, Sombra is dealing with new changes, both physically and emotionally. He is now dating Twilight Sparkle and has moved to Ponyville with hopes of a fresh start. What kind of wacky adventures can the former Shadow King get into?

Inspired by KnightMysterio's take on the Nightmare-Timeline in the story Context

The Princess of the Sun has fallen, the Queen of the Night now takes her place.

To the surprise of many, Nightmare Moon isn't evil. Or insane for that matter. She is attempting to be a queen that can properly rule a nation she has not seen in a thousand years. Some will try to aide her, others will attempt to thwart her, but the Wrath of the Night is something not to take lightly.

However, Celestia may have made a mistake in letting Luna fade from history and the only mention of Nightmare Moon become a demonized fable- no one would take that very well in her place.

Features: Twilight reluctantly helping a Sane and Noble NMM, curious and confused guards, and ponies being reminded of their lost history.

This story is a sequel to April Fools!

"Pinkie."
"What?"
"I'm pregnant."
"..."
"Pinkie?"

Sombra decides to prank Pinkie, but, like the last time, it doesn't go very well.

Stories that follow the original are optional. This story takes place years after the first, so the setting is different.

It's Sombra and Pinkie's 10th Hearts and Hooves Day, and while they want to celebrate, there's one issue...

Their son.

This takes place after the events of No Day But Today, though it's not really a sequel. This is a Hearts and Hooves Day special, really. Yeah, I know it's late, but whatever, I do what I want.

After Sombra gets into an intense argument with Pinkie, he seeks out advice from her friends, only to find they side with Pinkie on the matter. Spike, being extremely sway-able in terms of arguments, sides with the girls and leaves Sombra out to dry. Realizing only one other male in his close net of friends, Sombra begrudgingly accepts Discord's thoughts on relationships.

The poor, damn fool.

This story takes place during Chapter 27 and the Epilogue of the series The Not-So-Normal Adventures of King Sombra and Pinkie Pie.

This was a product of my 400+ Follower Story Vote