In some fanfictions, the Black Shuck could be a guardian of a hidden magical artifact. It's a fearsome beast that wards off those unworthy of approaching the powerful item. Maybe it has a connection to an ancient wizarding family, and only a descendant of that family can communicate with it or pass by it without being attacked.
Another way is that the Black Shuck is a manifestation of an ancient magic that has been long forgotten. A group of students in the fanfiction could discover some old texts about it and decide to investigate. As they dig deeper, they find out that this Black Shuck is connected to a much larger mystery that could change the way they view the history and magic of the wizarding world.
In some pitch - black Harry Potter fanfictions, there might be a storyline where Voldemort actually had a valid reason for his actions, at least from a certain perspective. It could explore how the wizarding society's discrimination and power - hungry nature drove him to the dark side, and Harry has to grapple with this new understanding. Also, a story could involve Harry being corrupted by the power he holds, turning him into a much darker character than we know from the original books.
The plot where Murtagh teaches Harry some of his unique magic techniques is really cool. It shows how different magical systems can interact. For example, in a fanfic I read, Murtagh showed Harry how to use a spell that was common in his world but unheard of in Hogwarts.
Perhaps a storyline where Fem Harry discovers a connection between the magic in the Harry Potter world and the arcane powers in Warhammer. She could then embark on a journey to understand this connection better, facing challenges along the way. She might meet characters from both universes who either help or hinder her in this quest, making for a very engaging fanfiction.
There are also fanfictions that look at Helena Ravenclaw from the perspective of her motherly love for Hogwarts. She's like a protective spirit in these stories, and the plot might involve her guiding certain characters, like Harry or Hermione, through difficult times at Hogwarts. It's a heartwarming and different take on her character that shows her connection to the school in a more emotional way.
Well, in some fanfics, like 'The Darker Side of Redemption', Lucius is given a chance at redemption after the fall of Voldemort. Harry plays a key role in this process, either by being a reluctant helper or an unexpected friend. The plot often involves exploring the darker parts of the wizarding world that were not fully shown in the original books.
One of the most interesting storylines could be a dragon handler who discovers a new breed of dragon in the Forbidden Forest. This could lead to a whole adventure of trying to keep it a secret from the Ministry of Magic while also learning about its unique abilities. Another could be a dragon handler who has to deal with a dragon that has been poisoned, and they have to find a cure using their knowledge of both magic and dragon physiology. Maybe a dragon handler who forms a special bond with a dragon and uses that bond to help in the war against Voldemort, like using the dragon to transport crucial supplies or even fight in battles.
One of the most interesting things is the exploration of Draco's character. In the official books, he's often seen as a bully. But in fanfiction, we can see his vulnerability and the pressure he's under from his family. Also, the relationships between the Malfoys and other families are often explored. How they interact with the Weasleys or the Potters in alternate scenarios is really engaging. And sometimes, fanfictions create new magical elements related to the Malfoy family, like a hidden Malfoy family magic that's been lost for generations.
One intriguing use is when Parseltongue is used as a form of communication in a romantic or sexual encounter that is unique to the fanfiction world. It can add a layer of secrecy and excitement, like a private language between lovers.
One interesting plot could be Harry using his magical skills in veterinary work. For example, he might use spells to heal injured animals quickly. Maybe he'd have to deal with magical creatures that are acting strange and he has to figure out if it's a magical illness or something else.