Another option is Reddit. There are subreddits dedicated to fanfiction, like r/FanFiction. You can post a request for MHA Harry Potter fanfiction there, and the community might be able to recommend some great reads. Also, sometimes people share their own works on these subreddits.
A really cool MHA Harry Potter crossover fanfiction is 'Heroes at Hogwarts'. In this story, the unique powers of the MHA characters interact in fascinating ways with the magic of Harry Potter. For example, Deku's One for All quirk has some unexpected interactions with spells. It's a must - read for fans of both series.
One interesting crossover could be the magic system of Harry Potter being introduced to the MHA world. For example, a character from MHA might discover they have magical abilities like a Hogwarts student. Another could be the heroes from MHA having to face off against dark wizards from the Harry Potter universe. It would be a really cool mix of the two different power dynamics.
The magic system could be incorporated by having Hogwarts - like schools in the MHA universe. Teachers could teach spells and potions, and students would develop their magical abilities as they do their quirks. Magic could also be used in combat situations in the MHA world. For instance, a character could use a levitation spell to gain an advantage in a fight against a villain. This would add a new layer of strategy to battles in the MHA world.
A cool plot might be that the Hogwarts students attend U.A. High School. Hermione would surely excel in academic subjects there, while Ron could struggle a bit more. And Harry could use his experience with fighting dark magic to help in hero training. They could also introduce magic - based quirks to the MHA world, which would change the dynamic of how heroics are done.
I think Harry Potter himself would be very powerful in this crossover. He has the experience of fighting dark wizards and his magic skills. If he was in the MHA world, he could use his magic to enhance his physical abilities like the characters with quirks. His ability to resist the Imperius Curse and his knowledge of defensive magic would give him an edge over many MHA villains.
In Harry Potter fanfiction, the Malfoys are often portrayed in a more complex and sometimes positive light. Some fanfictions might explore Draco Malfoy's struggle between his family's beliefs and his own emerging sense of right and wrong. He could be shown as having a change of heart, perhaps influenced by his interactions with Harry and his friends. This gives a new dimension to his character that we don't fully see in the original books.
In Harry Potter fanfiction, the exploration of good and evil can be really interesting. Some fanfics might show how characters who seem evil in the original series have a more complex backstory that makes them not entirely bad. For example, Draco Malfoy. In some fanfictions, he could be portrayed as a victim of his family's expectations rather than a pure - bred villain.
One great Petunia fanfiction could be one where she has a moment of self - realization. Maybe she discovers some of Lily's old magic things and starts to understand the wizarding world better. It could show her in a more sympathetic light, perhaps she even tries to protect Harry in her own way.
One great 'Harry Potter' fanfiction is 'The Life and Times' by Jewels5. It delves deep into the Marauders' era, exploring the relationships between James, Sirius, Remus, and Peter. It gives a lot of backstory and really fleshes out that time period in the wizarding world.
Yes, there are quite a few interesting 'Harry Potter is a Slythindor' fanfictions. Some explore how Harry's character would develop differently in Slytherin. He might face different challenges and form unique relationships compared to being in Gryffindor. For example, he could have more complex interactions with the pure - blood - centric Slytherins and still uphold his values of justice in a different way within that house.