Missing Fic Exploring Religion in HP
Can anyone help? I'm looking for a fic I read about 10-15 years ago that went into the possible religious side of HP.
I recall there being a few different 'covens' that were equivalent to big churches, with more powerful ones similar to the Vatican and then smaller local ones that were just for close-knit community events. Some people, like Luna, were genuinely into the spiritual side of it and others used them more for networking to get ahead in their career. A lot of the covens were more friendly and would meet up together for things like summer solstice parties and Halloween celebrations, and anyone was welcome (The Weasleys are part one one like this) and students can be invited to apply as initiates once they are of age. Then other families like the Malfoys are part of very old, very exclusive covens that had a lot of focus on fertility rituals, and dinner parties and events were all themed around those symbols as a normal part of their culture. To the point where it's considered almost rude to not join in to some extent.
It was pretty well written, but I have no idea what the title was as it was so long ago. Despite the theme, most of it wasn't NSFW and it went into a lot of behind the scenes politics. I remember Snape's dad was Irish catholic in it, and he was raised very strict catholic and went to a not very nice school run by nuns at a local chapel before getting his letter and escaping. He was agnostic as an adult, but had to constantly try to get out of joining in the more lewd rituals whenever he was invited to pureblood events with the Malfoys and DEs. It went into a lot of shame/repression type psychology, Snape being told he was evil/possessed and other things when he was a kid. It was pretty dark.
I remember Hermione was involved as well (she was older than canon, as she'd used a time-turner so often and had secretly started an apprenticeship with another professor at the school, which only Dumbledore and McGonagall knew about). She's working in a London apothecary in the summer holidays, when her normal route is blocked off due to some muggle incident and she can't apparate and Lucius picks her up while she's walking around and has his driver drop her back home. He makes a deal to teach her old coven etiquette laws/rituals so that she can get into a good one despite her background in order to network. And in return she agrees to basically spy on Draco and Snape for Lucius, as he convinces her that he's concerned about the both of them.
If anyone knows which fic I'm talking about, can you let me know? It was pretty long, but I don't remember much else.
