Rec: Blood and Brimstone (hd_career_fair)
This fic is recced everywhere, i'm still awfully busy, but I just wanted to pay homage to the author.
Don't be afraid by the length (42k), don't be afraid by the AU (it is a mix between HP and 'Wicked Gentlemen"). Blood and Brimstone at hd_career_fair is a real masterpiece and you'll be sucked into this universe from the first paragraph.
If you want to know more about how I feel about the fic, I commented here. I'm just in awe. And even if the end is perfect, how I'd like to know what happens next.