Well, there's a fanfic called 'Harry Potter: Xianxia Transformation'. In this one, the characters from Harry Potter are thrown into a xianxia setting. For example, Hogwarts is transformed into a sort of xianxia sect. It's really interesting to see how the spells and magic in Harry Potter are adapted to fit the xianxia concept of qi and cultivation techniques. It also delves into the relationships between the characters in this new and different context.
One popular 'Harry Potter xianxia fanfic' is 'The Potter's Path in Xianxia Realm'. It combines the magical world of Harry Potter with the unique elements of xianxia, like cultivation and dao. The story follows Harry as he discovers new powers and adventures in a xianxia - like version of the wizarding world.
Most official Harry Potter works don't have the concept of 'concubine'. Fanfics with such a concept might be rather unorthodox. I would suggest looking for fanfics that expand on the magical elements, friendships, or the fight against evil in the Harry Potter universe. For example, some fanfics that explore the backstories of minor characters can be really fascinating.
There are many 'Harry is Lord Potter' fanfics that explore different aspects of Harry's character. Some focus on his relationship with his friends in this new role. For example, how Hermione and Ron react to Harry being 'Lord Potter'. It could be that they are in awe, or perhaps they have some concerns about how this new power will change him. Another aspect could be the political implications in the wizarding world. With Harry as 'Lord Potter', there could be a shift in power dynamics among different wizarding families and institutions.
One great 'Harry Potter' read - the - books fanfic is 'The Librarian's Apprentice'. It delves deeper into the Hogwarts library and the secrets that might be hidden within its dusty shelves. The author does a wonderful job of creating new adventures for Harry and his friends while still maintaining the charm of the original books.
Well, 'Mysteries in Ravenclaw Tower' is also quite good. The plot revolves around strange happenings in the Ravenclaw Tower. A young Ravenclaw tries to figure out what's going on, and in the process, uncovers secrets about the house that have been long forgotten. It's full of suspense and makes for an exciting read.
There's a fanfic where Harry has a telepathic bond with a dragon. In this 'dragon harry potter fanfic', the dragon helps Harry in his battles against Voldemort. It shows a really cool relationship between Harry and the dragon, with the dragon being a powerful ally that not many in the wizarding world are aware of.
Well, there are quite a few out there. One I remember is 'The Adventures of Daniel Marsh in the Wizarding World'. It has a really cool plot where Daniel Marsh, in the Harry Potter universe, discovers a hidden magic that could change the fate of Hogwarts. It's full of action and mystery.
One popular 'Harry Potter cross - dress fanfic' might be those where Harry has to disguise himself as a girl for a mission. In some of these fics, it leads to really comical situations. For example, his friends' reactions when they first see him cross - dressed can be quite hilarious.
One interesting 'Harry Potter x Nagini fanfic' could be 'The Unlikely Bond'. It explores a unique connection between Harry and Nagini in an alternate universe. In this story, Nagini is not just a tool for Voldemort but has her own consciousness and forms an unexpected alliance with Harry to fight against a greater evil that threatens both the wizarding and non - wizarding worlds.
There's a fanfic where a female yandere character is obsessed with Draco. In this story, she uses dark magic to eliminate any potential rivals. It's a really intense and somewhat dark take on the Harry Potter universe.
One interesting 'Bill Cipher Harry Potter fanfic' might be those where Bill Cipher's chaotic powers interact with the magical world of Harry Potter in unexpected ways. For example, there could be a story where he somehow gets involved in the Triwizard Tournament and causes all sorts of mayhem with his reality - bending abilities. However, it can be a bit hard to find really well - written ones as it's a rather niche crossover.