VN about Mahou Shoujos + Dark Genres

Oh, just right up my alley , i love these genre .
Basically most of the stuffs by heat-soft fits the bill. https://vndb.org/p384 especially the tokkai series, they remain one of my favorite over the years. also a few other mahou shoujo stuff by heat-soft are really great apart from the tokkai series. You will also want to check out the predecessors of primaviel zwei, and also the continuation of drei, drei DM. Other than that, escude also produced a few decent ones which are not 100% mahou shoujo but it does has good corruption element + fantasy in it such as revenger and liberator.

Other than those, you can also check out stuffs by maika, they are really great too. Also stuffs from zion. Their henshin heroine series all fits the bill. Great stuff.

Also a few from ordin-soft too, very classic stuffs, such as mahou shoujo erena, mahou shoujo mion, mahou shoujo rinne etc.

Too many to suggest, you should try one by one. All these are classic. I think i have more than 2TB of mahou shoujo related stuff in my hard drive