Loved it! Even though I'm a bit shaky on Supernatural canon, you gave us enough to make it all make sense. And Lucius's character was absolutely right.

I've always loved the Yeats poem and am now amassing a small collection of stories that use it as a jumping-off point. Have you read In the widening gyre by loyse of verlaine? (Pros fandom) - clever, creepy, and probably to your taste - and Pushkin's.