One possible plot could be that an Elder Scroll transports Harry to the world of the Elder Scrolls. There, he has to learn new magic and make new allies. He could bring some of his Hogwarts knowledge and skills with him. Eventually, he might find a way to return to his own world and use what he learned to defeat Voldemort in a new and unexpected way. This would involve a lot of world - building and character development as Harry adapts to a new and strange environment.
The plot could be centered around a prophecy that involves both the Harry Potter universe and the Elder Scrolls. Harry discovers that an Elder Scroll holds the key to preventing a great evil that threatens both worlds. He teams up with characters from the Elder Scrolls, like the Dragonborn. Together, they travel between the two worlds, facing challenges in each. They might have to combine the magics of both universes, for example, using Hogwarts spells along with the Thu'um (the Shouts in Elder Scrolls). This would create a really interesting and complex story with lots of potential for adventure, mystery, and magic.
Well, it's quite possible that such a fanfiction exists. Another option is to check out some Harry Potter or Elder Scrolls - focused fan communities on social media platforms like Reddit. There are often sub -reddits dedicated to fanfiction where users share and discuss their works. You can post a request asking if anyone has read or written a 'Harry Potter has an Elder Scroll' fanfiction, and someone might be able to point you in the right direction.
A plot could involve a symbiote attaching itself to Harry. This symbiote might have its own motives. It could be from another dimension where magic and symbiotes are intertwined. The symbiote could start influencing Harry's actions, making him more aggressive in his fight against Voldemort. But at the same time, his friends are suspicious of the changes in him. As the story progresses, Harry has to learn to control the symbiote and use its power for good while also dealing with the internal struggle of not losing himself to it.
Maybe Harry is at a Quidditch match. He's flying high in the air on his broomstick, but suddenly he feels the urge to pee. He can't just fly down to the loo in the middle of the game. His teammates notice his distracted state and wonder what's wrong with him. It could lead to some interesting interactions among the Gryffindor team members as they try to figure out what's up with Harry while still playing the game.
Perhaps the plot could be that the child of Harry Potter gets sent back in time accidentally. There, they meet a young Harry and his friends. The child has to be very careful not to disrupt the past too much while also trying to find a way back to their own time. This would be filled with lots of tricky situations, like when they almost reveal future events or when they have to avoid being seen by their own young parents.
In a Harry Potter has a son fanfiction, the plot could involve the son inheriting his father's magical abilities and facing new threats at Hogwarts. Maybe he discovers a hidden chamber that holds a powerful and dangerous magic. He might also have to deal with the pressure of being Harry Potter's son, with everyone having high expectations of him.
The plot could involve Harry finding the scythe in a hidden chamber at Hogwarts. Maybe it was left there by an ancient wizard, and the scythe has the power to cut through dark magic. Harry then has to learn how to use it to fight Voldemort in a new and unexpected way.
In a fanfiction plot, Harry could be born with telekinesis but it was suppressed by the magic that protected him as a baby. When he enters Hogwarts, the magic of the school starts to awaken this power within him. His friends are both amazed and a bit scared at first. As he hones his telekinesis, he uses it to uncover secrets in the castle, like hidden passages that were sealed off long ago. But this also attracts the attention of dark forces, and he has to use his power to defend Hogwarts and the wizarding world from a new threat that is related to an old, forgotten magic.
Perhaps in this fanfiction, Harry is born with a tail due to some ancient magic that was dormant in his family line. This tail could be a sign of a special power he has yet to discover. He might have to go on a journey to find out the origin and purpose of his tail, with his friends Ron and Hermione helping him along the way. They could explore hidden chambers in Hogwarts or ancient wizarding libraries to uncover the mystery.
One possible plot could be that the maid is a magical being in disguise. She could be secretly helping Harry Potter with his tasks at Hogwarts, like cleaning up after his potion experiments in a much quicker and magical way than normal. Maybe she has some hidden knowledge about the Dark Arts that she imparts to Harry in a very subtle way, which helps him in his fight against Voldemort.
One possible plot could be that Harry Potter loses his eyes in a dark magic encounter. His friends then have to help him navigate the wizarding world in a new way. Hermione might use her vast knowledge to create magical aids for him, like spells that create a sort of echolocation. Ron would be by his side, providing emotional support and physical protection when needed.