One interesting plotline could be the exploration of the 'Dark Prince' character's backstory. Maybe they have a complex family history that led them to their dark path. Another could be the unique magical abilities the Dark Prince has that set them apart from other characters in the Harry Potter universe.
Perhaps there is a plotline where Harry, as the dark prince, forms unexpected alliances. He might team up with characters who were once his enemies, but now they see a common goal in his new identity, which could lead to some really complex and exciting story developments.
One interesting plotline could be the exploration of dark magic in a new and unexpected way. Maybe the characters discover a hidden branch of dark magic that has been long forgotten. For example, a spell that can manipulate time in a very dangerous and unpredictable manner.
The main characters would include the Dark Prince himself. Then, we might see characters from the original series like Neville Longbottom having a more prominent role in this fanfic. Maybe he becomes one of the key resistance fighters against the Dark Prince. And there could be some new characters introduced, like a mysterious wizard from a far - off land who has some knowledge about the Dark Prince's true nature and comes to Hogwarts to help in the fight against him.
One interesting plotline could be the main character's struggle to fit in Slytherin while still holding onto some of the values Harry Potter himself represents. Maybe they're trying to change the perception of Slytherin from within.
One interesting plotline could be the exploration of the relationship between the main character and the elves. Maybe the main character discovers a hidden power among the elves that could change the wizarding world. For example, they might find a way to use elf magic in a new way that no one has thought of before.
One possible plotline could be that Harry discovers some dark family secrets that lead him to embrace the dark side. Maybe he finds out that his connection to Voldemort is more complex than he thought and decides to use that power for his own gain instead of fighting against it.
Another plotline could involve a group of students forming a secret society dedicated to exploring the dark path. They might start with small acts of mischief using dark magic but then spiral out of control as they delve deeper into the more dangerous aspects of the dark arts.
One interesting plotline could be the exploration of dark magic's origin within the wizarding families. Maybe a character discovers an ancient family heirloom that is tied to dark inheritance and has to face the consequences of that discovery.
In some 'harry potter dark king fanfiction', there could be a plotline where the dark king has a hidden agenda related to ancient magic. He might be searching for a powerful, long - lost spell or artifact that could give him ultimate control over the wizarding world, and Harry Potter and his friends have to stop him.
One interesting plotline could be a character who was once a normal Hogwarts student being drawn to the dark side and becoming a Dark Paladin. They might start to question the traditional values of the wizarding world and form new alliances with dark forces, leading to a whole new set of challenges for Harry and his friends.