One interesting plot could be the exploration of the dark underbelly of the wizarding world economy in fanfiction. Maybe how certain dark artifacts are traded on the black market and how it affects the overall power balance among wizards.
Some fanfictions might have a plot where dark wizards create a new and dangerous business that involves using dark magic to control or manipulate other wizards. This could lead to a power struggle between the good and the bad, with Harry Potter and his friends having to figure out how to stop it. They might have to infiltrate this dark business, which would be full of dangerous spells and traps.
One possible plot could be Moriarty trying to infiltrate the wizarding world of Harry Potter for his own business gains. Maybe he wants to get his hands on some magical artifacts to sell in the Muggle world. Another could be Harry Potter teaming up with Moriarty's intelligence to solve a mystery in the wizarding business world, like uncovering a plot to monopolize the sale of certain potions.
One interesting plot could be the discovery of long - hidden dark magic spells within Hogwarts. Maybe a character stumbles upon a secret chamber filled with forbidden knowledge.
One interesting plot could be the formation of an unexpected alliance within the Dark Brotherhood in the Harry Potter universe. For example, a character who was initially thought to be on the side of good might be forced to work with the Dark Brotherhood due to some dark magic threat that only they seem to have the knowledge to combat. This could lead to a lot of internal conflict as the character struggles with their own moral compass while trying to survive in this new and dangerous situation.
Well, one interesting plot could be the internal struggle of the son. He might be torn between the dark heritage from the Dark Lord and the good influence of Harry Potter's world. Maybe he has to hide his true identity while trying to figure out his own moral compass.
Well, some fanfictions might have a plot where the dark arts master has a unique connection to an ancient and powerful dark magic artifact. This connection could drive the story as the character tries to either master the artifact's power or keep it from falling into the wrong hands, all while dealing with the challenges in the Harry Potter universe like avoiding the Ministry of Magic's detection.
One interesting plot could be a dark elf slave who discovers hidden magic within themselves that is unique to their kind. This newfound power might help them in their struggle against the unjust treatment they receive in the wizarding world.
Another plot could involve Harry forming his own group of outcasts. Since he's neglected by his family, he feels a strong connection to other students who have been shunned or mistreated. Together, they start to explore the darker aspects of magic as a form of rebellion against the traditional wizarding world that has failed them. They might find a hidden lair in the Forbidden Forest where they practice their magic away from prying eyes, and this lair could hold secrets that date back to the founding of Hogwarts.
One possible plot could be Snape getting involved in a risky mission within the wizarding world that somehow involves Harry Potter. Maybe it's a mission to retrieve a powerful and dangerous magical artifact that Voldemort is also after. And Harry, against Snape's initial wishes, tags along and they have to learn to work together, facing numerous magical creatures and dark spells along the way.
In some Harry Potter 8 fanfictions, there are plots where the characters continue to face new dark magic threats. For example, a new dark wizard might emerge, and Harry, Hermione and Ron have to use their combined skills and knowledge to defeat this new foe. Another plot could be about the exploration of the wizarding world's past in more depth, revealing secrets that were previously unknown.
One possible plot could be Harry being influenced by dark magic artifacts. For example, he might find an ancient cursed object that gradually corrupts his mind and makes him turn dark. Another could be that he is betrayed by those he trusts, which pushes him over the edge into darkness.