Twilight Sparkle is and always will be a delightful and intelligent fraulein. However, when a cult of unicorns who fervently support the Return of King sombra took interest to her, things quickly got out-of hoof.
Day by day, Twilight gained strength, studied the Darkest magics known, and even fell in love with the unicorn mentoring her in these ancient and terrifying arts. She became isolated from her friends, and began to prepare to betray the country she once loved, in the name of glory and the pursuit of power.
This is no fairy tale. There will be war, there will be battle, there will be death, and there will be blood. There will also be romance, ballroom dancing, kisses under the moonlight, and most delightful of conversations too.

King Sombra survived his defeat, but just. By the time he returned to form, Twilight became the newest princess of Equestria and the Crystal Empire was restored to its former glory.

He cannot take over Equestria the same way he tried before, but he has a card up his sleeve. Twilight won't see it coming, and Sombra might gain a powerful ally in the process.

And it will all begin...with a book.

Edits on Chapter 1 done with the help of TempesttheDragnix.

Major props to InuHoshi-to-DarkPen for letting me use this. That artist is really good.

The Princesses have been hiding something about a certain unicorn but they have not revealed it to any one

Equestria is as most pony's know it all but gone. King Sombra and his Queen rule with an iron hoof.
Five mares and one Draconequus spend their time in a dark prison cell. Until one day they are visited by someone Discord never wanted expected to ever see again.
His older Brother.
Inspired by the fantastic Lost into Shadow. and its Sequel.

Ten years after Twilight Sparkle became a princess Equestria is at the edge of a war. Many innocent ponies are killed in the most horrifying ways and the Elements and Princesses can't seem to find out who did it to the ponies. But when one of Equestrias most loyal and trusted turns against them and joins the dark side almost everyone loses hope.

My extraordinary editor:
Grendeer
FimFiction - http://www.fimfiction.net/user/Grendeer

My exemplary artist:
DearMary
FimFiction - http://www.fimfiction.net/user/Orchid+Star+eyes
DevianArt - http://dearmary.deviantart.com/

Years have passed since King Sombra was defeated, but the ruler of the shadows was risen from the ice mountains.
Now, he has a new plan, something that will surprise everypony.

This story is a sequel to The Return of the Shadows

Princess Celestia sends King Sombra to Ponyville to learn about friendship with Twilight and her friends.
But days passed, and between Sombra and Twilight something else grows.

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!

This story is a sequel to Lost into Shadow

Twilight has failed, or rather, she has succeeded. Her darkness is her power, and together with her husband, Queen Twilight has a new plan for all of Equis. The black castle rises to greater power than has ever been seen before. War is brewing while alliances are forged and others are broken. The days of harmony are dead and gone, and all the world will be forced to mobilize against the might of the Nightmare Hordes. Will they prevail in the faces of Wrath and Despair? Do they have any hope of someday returning to a time of peace and love?
....
........
Not a chance, because in Chapter 1, Hope dies.

This story is a sequel to Lost into Shadow

The impossible has happened, through all the pain and darkness, Twilight Sparkle succeeded in her impossible mission...mostly. King Sombra is still plenty rough around the edges, but despite being an old dog he's making an effort to learn new tricks. Where will this new way of life take him? He has absolutely no idea, but with his queen to guide him, what could possibly go wrong?