One interesting fanfiction could be where Harry's mismatched eyes are a sign of a hidden magical power. Maybe they allow him to see different magical frequencies or dimensions that others can't. Another could be a story where his eyes are the result of a complex family magic that was long forgotten.
It could be developed by making his eyes a symbol of his unique identity. For example, they could be the reason he has a special connection to certain magical creatures. Maybe he can communicate with a rare beast because of his eyes.
One 'Harry has purple eyes' fanfiction could be about how his unique eye color sets him apart in the wizarding world, leading to new adventures. Maybe he discovers a hidden power related to his purple eyes.
One great 'Jaded Eyes' Harry Potter fanfiction could be the one that explores a more cynical view of the wizarding world. It might show Harry dealing with the darker sides of magic and politics in Hogwarts that are often overlooked in the original series.
Well, I'm not sure of a specific 'Harry Potter has mystic eyes' fanfiction off the top of my head. But you can start by looking on fanfiction platforms like Archive of Our Own or FanFiction.net. Search for the exact phrase 'Harry Potter has mystic eyes' and you'll likely find a variety of stories. Some might explore how his mystic eyes are related to his connection with Voldemort, while others could show how they affect his relationships with his friends at Hogwarts.
One interesting fanfiction could be about a character who has a special connection with the basilisk eyes. Maybe they can see visions through the eyes, like seeing the past secrets of Hogwarts that the basilisk might have witnessed. Another could involve a spell that uses the power of the basilisk eyes in a new and unexpected way, for example, to unlock a hidden chamber in Hogwarts that was previously unknown.
There might be a fanfiction where 'hell eyes' are related to a curse. For example, a wizard is cursed with 'hell eyes' which cause him to see terrifying visions. He then has to find a way to break the curse with the help of his friends from Hogwarts, like Hermione and Ron. They might search through the restricted section of the library to find a solution.
There might be a fanfiction where Harry has red eyes due to a new, unknown magical ability awakening within him. This could lead to him being feared by some and revered by others in the wizarding world. He would have to learn to control this new aspect of himself.
One could be a story where Harry Potter has to use crutches after a particularly dangerous encounter with a dark creature in the Forbidden Forest. The crutches become a symbol of his vulnerability yet also his determination to keep fighting against the dark forces.
One great fanfiction could be about Harry having a hearing disability. It might show how he uses magic to compensate, like creating spells to read lips or enhance sound in a different way. Another could be where he has a physical disability, perhaps from a dark magic attack that left his leg not fully functional, and how he overcomes challenges in Hogwarts, like climbing the stairs with the help of his friends and magic.
One popular 'Harry Potter has muscles' fanfiction might be where he uses his newfound muscular physique in a duel. Maybe he's able to overpower his opponents more easily with his strength, adding a new dimension to the magical battles.