Twilight Sparkle is practicing transformation spells one day when she messes up and unintentionally kills a good friend. What is Twilight to do now? How can she live with herself?

This is meant to be a short little story so I'm sorry if the description is short >.<

The night after the Crystal Empire was saved, Twilight Sparkle had a vision in her sleep of King Sombra warning her that he would return soon. Twilight grows worried but has faith that the power of friendship will conquer him. King Sombra may have not spoken much during the battle, but he has plenty to say to Twilight...

This short story was written up in just a few days and might be a bit choppy so I apologize if it seems that way...

Image drawn by atryl on deviant art. http://browse.deviantart.com/?qh=&section=&global=1&q=King+Sombra#/d5ktry5

Twilight discovers the journal of King Sombra, and the unexpected secrets within.

A special thanks to my editor Stereo_Sub for such amazing editting.
Also a thanks to Gela-G-I-S-Gela for the coverart

Twilight Sparkle had to use King Sombra's Dark Magic to solve various puzzles. She claims that Celestia showed her how, but how is she perfect at the spells at the first go? Something stinks of a nefarious plot....
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I hope everpony likes this! I had this idea after watching the Season Three premier, and it wouldn't go away until I wrote it! I'm sorry if the writing isn't up to your standards, but I'll appreciate and constructive criticism!
Also romance for eventual shipping.

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.

Prequel To These Dreams and Renew.

Twilight begins having weird dreams after returning home from the wedding of her brother and new sister-in-law. Her dreams seem to be having a connection with Discord in them. What exactly is going on here and why is she having dreams related to him? And is she feeling regret having him to be trapped in stone for eternity?

It will become DISCOLIGHT soon.

After unexpectedly being freed during a Changeling invasion, Discord finds himself allying with the Queen of the Changelings and the Mare of the Moon. In a bid to weaken their enemies, they take the element of magic, Twilight Sparkle, as a prisoner. Twilight then finds herself becoming a pawn each of them wants to use to secure their own dominance.

Will she be able to resist these beings of darkness, or will she fall into the darkness herself?

Discord is trapped in stone once again. But this time, he does some thinking. No, not about revenge, mind you. But about a certain lavender mare...

This story is a sequel to A Pony's Sympathy

Following Discord's last escape from stone [as seen in A Pony's Sympathy], Twilight Sparkle sought to understand his role in the keeping of Balance in Equestria

Her want to understand sparked an alliance of sorts, a kind of understanding between them. Although having one pony in his corner has done little to convince the rest.

His lack of empathy and understanding of a pony's sensibility has been tolerated by Celestia.

But while both the princesses and the bearers of the Elements of Harmony struggle with even more dire problems, Discord is forced into a lesson of his own, and it could not have come at a more inopportune time.

Continuing the story of A Pony's Sympathy, the fledgling friendship between the Spirit of Chaos and the Element of Magic may determine the fate of the ponies, and the way both sides of harmony regard one another.

[Written/published between Nov. 2012 and Nov. 2013, based loosely on Star Trek: The Next Generation episode 3x13 'Deja Q']

This story takes place a bit after the events of King Sombra and The Crystal Ponies, also to mention this story is about a female Draconequus named Eris who loves chaos just as much as Discord but is very different.

After hearing her brother Discord was turned to stone once more, Eris decides to make a trip to visit her reckless brother yet everypony is terrified by her appearence she takes no mind to it as a certain purple coated unicorn decides to attempt at making this devious Draconequus her friend, yet Eris feels something tugging at her about this mare which she just cannot ignore..