A strange series of occurrences are plaguing the fine city of Canterlot, as one by one, a pony of vengeance strikes seemingly random ponies down in their prime. As the locals try to contain the situation, they find that it soon slips out of their hooves as they discover that this one simple pony might not be as simple as was originally thought. Once Twilight Sparkle and Princess Celestia gets involved, can everyone work together to bring down this threat that threatens to ruin the very core of Canterlot? These City Walls is an exploratory tale about character, relationships, mystery, and the very old, ancient powers that be. And once five innocent ponies get tied up in the lives of each other, a struggle begins to keep the entire city safe for future generations.

This is a primarily OC story. Yes. Run. Run in fear.

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.

Spike orders a How-To guide book to win Rarity's heart. Will Spike be able to follow all the steps like a true gentlecolt? Will any of the steps actually work? And just what is Rarity looking for in her friendship with Spike, anyway?

Image by VanilleCream at DeviantArt (used by permission).

Totally awesome fanart by Multiversecafe found here: http://multiversecafe.deviantart.com/art/How-to-Woo-your-Lady-in-9-Easy-Steps-285329019