Emerjas

While Loki: Where Mischief Lies starts and ends in Asgard, the majority of the story takes place in London where Loki is sent to investigate a series of magical murders. It's not much of a mystery as it's pretty obvious before he even leaves who is murdering the people, but Loki solves it halfway through the book and more of the story is spent on him figuring out what he is going to do about everything. However, there's plenty of supernatural stuff in it since the main character is a god and magic is used throughout the book. I'm using this for the Darkest London square. It would have also worked for the Cryptozoologist, Deadlands, and Spellbound squares.