What are some interesting plot ideas in Harry Potter dark mark fanfiction?

One idea could be that Harry gets the Dark Mark by accident and has to figure out how to hide it from his friends. Maybe he discovers that the mark has some unexpected powers that he has to learn to control.

A possible plot in Harry Potter curse mark fanfiction is that the curse mark is actually a key to an ancient wizarding mystery. The main character, who has the mark, finds that they are suddenly being hunted by dark forces who want to use the mark for their own evil purposes. As the character tries to figure out what the mark means and how to protect themselves, they discover that it is linked to a prophecy. They must then decide whether to embrace the power that the mark might bring or find a way to destroy it completely, all while dealing with the normal challenges of Hogwarts life like exams and friendships.

One interesting idea could be how the soul mark changes the relationships between characters. For example, it might make a character realize a deeper connection to someone they previously overlooked. Another could be the mystery surrounding the origin and meaning of the soul mark in the wizarding world. It might be a sign of a great destiny or a powerful magical bond.

One possible plot idea could be the Dark Prince having a hidden agenda that not even Voldemort is fully aware of. He might be secretly manipulating events to gain ultimate power for himself. For example, he could be using the chaos of the wizarding war to his advantage by making deals with both sides without their knowledge.

One idea could be that Harry discovers a dark secret about his family that leads him down a dark path. For example, he might find out that his ancestors were involved in some really evil magic and he starts to explore that side of magic. Another could be that the influence of Voldemort somehow remains and corrupts Harry's mind over time. Maybe the Horcrux inside him wasn't completely removed and it starts to change his way of thinking.

One idea could be that Harry, influenced by dark magic, forms an uneasy alliance with Voldemort. They could team up to take over the wizarding world in a different way than Voldemort originally planned, perhaps by ruling jointly. Another plot could involve Harry exploring the darker aspects of his own magic and using some of Voldemort's knowledge to do so, which causes a rift between him and his friends.

One idea could be Harry, as a dark necromancer, using his newfound powers to bring back some of the great wizards from the past to learn from them, but the magic has unforeseen consequences like attracting dark entities. Another could be that he's on a quest to revive a loved one, which goes against the natural order of magic in the wizarding world and causes a rift between him and his friends.

One interesting plot idea could be a story where a student discovers a long - lost dark arts spell book in the Forbidden Forest and has to resist the temptation to use the powerful and dangerous spells within it. This could lead to a battle between good and the allure of the dark arts within themselves.

One plot idea could be that Draco discovers Hermione has a connection to the Dark Mark against her will. Maybe she was cursed with it during an encounter with Death Eaters. Draco, having some knowledge of the Dark Arts, decides to help her get rid of it secretly, which would lead to many tense and secretive meetings between them as they try to figure out how to break the curse without getting caught by either side.

In a dark fanfiction, Voldemort could have placed a dark spell on Harry long before he knew. As Harry grows, the spell starts to take effect, making him darker. Luna, being an outsider in many ways, notices the changes in Harry. She decides to research ancient magic to find a way to break the spell. Along the way, she discovers secrets about her own family's magic that could be the key to saving Harry and the wizarding world from the impending darkness.