I was going to wait to rec this fic until it was completely posted, but since it is a finished fic and the author posts twice weekly updates and it's awesome, I'm going to go ahead and do it now.
If you're not reading
Dust Devils by
sharlot1926 please do so. It has one of the most imaginative premises that I've come across and is beautifully written with an intriguing mystery, monsters both human and supernatural, a fantastic setting and OCs that just jump off of the page. It's set in season two just after Born Under A Bad Sign.
I can't rec what I've read so far highly enough and I'm sure the ending will live up to the beginning. Give it a shot and see what you all think!