What are some interesting plot ideas for a Harry Potter murder mystery fanfic?

One idea could be exploring a character's backstory that wasn't fully covered in the game. For example, delving deeper into the family history of a side character. Maybe they have a hidden connection to one of the main wizarding families. Another plot could involve a new mystery within Hogwarts, like a secret chamber that has been long forgotten but holds a powerful magical artifact. A third idea would be to create an alternate timeline where a major event in the game didn't happen, and see how it changes the relationships and the overall story at Hogwarts.

One idea could be that the apple family's old heirloom apple orchard is at the center of the mystery. Maybe a rare and valuable apple variety was discovered there, and someone in the family was killed to keep it a secret. Another could be a family feud over inheritance that turns deadly. A long - lost relative shows up right before the murder, adding to the suspicion.

One idea could be a story where the main character discovers a hidden chamber in Hogwarts that has been lost for centuries. It could be filled with ancient magic and dangerous creatures. Another plot could involve a time - traveling adventure, where the character goes back in time to witness a significant event in Hogwarts' history. Maybe they have to stop a dark wizard from changing the past. A third idea is a story centered around a mysterious new student who has a special power that no one understands, and the main character has to figure out if they are a friend or a foe.

A cool plot for a Harry Potter Twilight fanfic could be a competition. The wizards from Harry Potter and the vampires and werewolves from Twilight compete in a series of challenges. These challenges could test both magic and the unique abilities of the Twilight characters. Or perhaps a love triangle between a Harry Potter character, a Twilight vampire, and a Twilight werewolf. It would be interesting to see how the different cultures and powers interact in matters of the heart.

Another plot could focus on the lives of the secondary characters from the original series. For example, Neville could be the head of Herbology at Hogwarts and discovers a new, dangerous plant that has some sort of connection to an ancient magic. The 'carry on fanfic' could then be about how he and his students deal with it, with some cameos from the main characters.

One idea could be that a dragon escapes from Gringotts and Harry has to use his skills to track it down. Maybe the dragon has a special connection to a powerful dark magic item that Voldemort was after.

One idea could be that Voldemort somehow enters the Runescape world to seek more power. Harry and his friends follow him there to stop him. They have to learn the rules of Runescape quickly to be able to fight Voldemort. Another idea is that a Runescape wizard discovers a portal to the Harry Potter world and brings some of the unique items from Runescape, like special runes, which causes a stir in the wizarding world.

A great plot for a Harry Potter academy fanfic might be a time - travel scenario. A group of students accidentally travel back in time to the founding days of Hogwarts. They have to navigate the different rules and attitudes of that era while also trying not to change history too much. Or perhaps there's a plot where a student is wrongly accused of a major crime at the academy and has to prove their innocence. They'll need to use their wits and the help of their friends to find the real culprit.

Perhaps in the fanfic, the snake is a key to unlocking an ancient magic that has been lost in the wizarding world. This could lead to a whole new adventure for Harry and his friends as they try to understand and use this magic.

One idea could be a fanfic where a character discovers a long - lost wand with a special power. For example, a wand that can open portals to different magical realms. The character then has to figure out how to use this power without getting into too much trouble with the Ministry of Magic.