Man, thank you so much! I'm sorry I wasn't able to reply to your comment back when you left it, but I wanted to keep the anonymity of the exchange.
I really wanted to give Azkaban a new, twisted look to it, and I used that as the basis for this. I'm glad that it turned out so well for you. The ending is something I was hoping would actually fit into the story and not seem kind of tagged on, so I'm glad that it made sense for you.
Also, thanks for the rec! I think it's the first time any of my (admittedly small collection of) fics have been recced anywhere, so I appreciate it a lot. I'm keeping an eye open for the darkfest that's coming. :) Thanks again!