Luna discovers something hidden from Celestia for twenty years, now, with emotions running high, she enlists the help of the Mane 6... but what seemed to be a single mystery, soon reveals a darker and much more complicated plot that will soon decide the fate of Equestria.

Check out the Empty Room TV Tropes Page (Warning: Spoilers!)

Revised chapters edits and proofing (with many thanks) by: lammy, Trevor, Nick Nack, Fifth Alicorn

When a freak solar event threatens Ponyville and Princess Celestia is nowhere to be found, Twilight desperately casts the only spell that she thinks will help: a spell that transforms her into a vampire. Forced to deal with the side effects, Twilight relies on her vampirical side as she ventures into a life-threatening situation for the sake of the princess, Ponyville, and quite possibly all of Equestria.

Based on and inspired by the artwork of ponykillerx - http://ponykillerx.deviantart.com/
Cover image by ponykillerx - Used with permission
Edited by Spabble

Unable to have foals, Mr. and Mrs. Cake turn to a new technology. It works, and Pumpkin and Pound Cake are born as a result, but unfortunately, it also opens up a whole new can of worms with regards to parental rights when Pumpkin Cake's biological father tracks them down. Family ties are strained, friendships are tested, and the very foundations of Equestrian law are shaken in the resulting conflict. Meanwhile, how is this affecting the foals? Who is the true parent- the biological father, or the father that raised them?

Equestria Daily post

It's been a hundred years since Princess Celestia and Princess Luna were overthrown, and the Equestrian Republic was founded, a hundred years since anyone has gotten a cutie mark. So what happens when a completely ordinary pony living in the Republican Capital City of Ponyville woke up one morning and discovered that one has appeared on her flank?

Twilight Sparkle is accepted into Princess Celestia's School for Gifted Unicorns and gets a little more than what she bargained for.

Illustrated by me.

(If you object to swearing, please skip chapter 6. That's the one chapter that bumps this story straight up to a Teen rating.)

Twilight Sparkle: magician, scholar, bearer of the element Magic, and most of all, friend.
A bat, a book, and a bite can change so much of that, and bring darkness to her heart.
Can you keep your friendships when you might hurt those around you?
If you want to hurt them?
Bloodlust can bring an end.

What if Rainbow Dash had been present when Discord gave the Mane Cast their first shot at him? How could things have gone different? How could this have changed things?How could this have changed Twilight?

Update Schedule Below the Break.
Now with the super editor FredMSloniker!
Now with a wonderful cover image by Conicer!
Also - Awesome Fanart - http://nyuuchandiannepie.deviantart.com/art/Discolight-273099814

Update Plans
December 11 - Edited versions of first four chapters
December 14 - Chapter 5
Future updates at least 1 time per week.
Total Planned Chapters - 12

Life….
It doesn’t always go to plan.
It never has for Rainbow Dash.
One drunken summer’s night was all it took to change her life. Now Rainbow Dash finds herself pregnant. Follow her as faces this unexpected event.

Some things in this world happen by chance. Others do not. Twilight Sparkle is about to learn a disturbing truth that will turn her world upside down.

- Originally written May 2011 for Deviant Art

Reading this story first is strongly recommended:
(Blood is Thicker) http://ciroton.deviantart.com/gallery/26378692#/d3e1ndq

Credits:
~Image by JohnJoseco~ ~Edited by BrotherPrickle on Deviant Art~

~~~The other day I was thinking about why we haven't seen Trixie since "Boast Busters" and Luna since "Luna Eclipsed", and this is what happened.~~~

Long ago, in the magical land of Equestria, there were two regal Princesses. One, the eldest, was in charge of raising the sun and bringing the day to all the different kinds of ponies. The other, the younger sister, was in charge of raising the moon and bringing the night.

A thousand years ago, the younger sister had been banished from Equestria for refusing to lower the moon and attempting to plunge the land into eternal night. After serving her exile, she returned, and the two sisters tried to resume what they both hoped would be a normal life.

But a year has passed now since the younger sister's return... and promises made to her have not been kept. With one final decision, she seals Equestria's fate for the next one thousand years using magic deeper than any other.

~~Cover image used with permission from artist~~