Wow! This is easily one of the most fleshed-out AR/AUs I've read. I love the legends and mythology woven almost effortlessly into the story line and the unique alchemical/elemental spin you put on the magic. I also appreciated that you stuck to canon characterisation on a basic level: Albus the manipulator, aloof Severus, and exuberant Harry (who, naturally, has some grand destiny, hee). Excellent story. :)