I'd like to see Michael as Dorian Gray and his downward spiral into madness (or sin, whatever you wanna call it) but later on in his life he meets Adam and tries to better himself. The ending is up to whoever may or may not fill this as to weather Michael is able to redeem himself through the power of love or if he perishes in the same fashion as the book.
PROMPT: Team Dean/Castiel/Samandriel, The Picture of Dorian Gray AU