Equestria is growing, and magical savant Twilight Sparkle is disgusted by the crime and corruption this change has brought. Her life is changed forever when she discovers the Death Note, a notebook with inexplicable and deadly powers. She uses this book to pass judgement on those she deems unworthy of life, aiming to create a perfect world free of crime. But when the two Princesses put their best pony on the case, a mysterious detective known only as L, a psychological game of cat and mouse erupts between the two.
Comments contain spoilers. Artwork by blu-red, opening by Anon3mous. Now with its own TV Tropes page.

Years have past since the Infection swept throughout Equestria. Ponyville lays in ruin. The sun only hangs in the air for a few hours, the landscape is barren, and the skies are in utter chaos. So much has been lost to this plague. A single filly searches for answers amidst Ponyville's ruins. She seeks to unravel the chain of events behind this terrible blight, but finds much more in the shifting wastes.

Twilight Sparkle is tasked with checking over preparations for the Summer Sun Celebration and to make some new friends. Shortly after she enters Ponyville, a couple of colts lead Twilight to meet the Great and Powerful Trixie. Because of this, Celestia's star pupil meets and befriends different ponies than the ones she had intended.

Ponyville, by all means, has never been a town without incident. Somewhere within it, something was always going wrong somehow. However, for so many different things to go wrong so close together...it means things are more wrong than usual. And Twilight has more to do with it than even she realizes...

Some things are best left forgotten. The truth is not always sweet.

But, do not think things will be completely dark and grim! There will be plenty of strange things, and Pinkie Pie being Pinkie Pie! Because Equestria is not Equestria without its share of strange things.

(joint effort between a friend and I)

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

In a freak accident from the Cloudsdale weather control team, Twilight is struck down by an errant lightning bolt. But the veil of death is relatively thin...

This story is a sequel to The Rainbow's Surprise

On the day of Fluttershy and Rainbow Dash's wedding, Princess Celestia left Twilight a message saying that she should prepare herself if something happens. The next morning, Twilight awakens to find that all of Ponyville has succumb to a blinding fog. She must now travel a monster-filled town in search for her teacher and friends and try to return Ponyville back to the way it was.

How does magic really work?

Traditionally, a unicorn would learn most of his or her magic through study and experimentation. But what is the limit of a unicorns power?
What if this limit could be exceeded. What if the magic every unicorn is accustomed to using is only the first stage. The first path.
There is another path. The second path.

Twilight Sparkle believes she has made a new friend when a new pony moves into town. But when she stumbles upon his secret, she's pulled into the world of wartime Equestria. Can she use her brilliant mind to help defeat the enemies of Equestria, or will her mind fail her when it is needed most?

After a dragon attacks Ponyville, Twilight discovers she has a strange new ability. What does it have to do with the dragons that are cropping up everywhere, and what will it mean for Equestria? (Skyrim Crossover)