A unique plot could be that Harry gets transported to an alternate magical realm where martial arts are the main form of magic. So instead of using wands, spells are cast through precise martial arts movements. He has to learn these new skills quickly to survive and find his way back to his own world.
Another idea is that Harry is cursed by a dark wizard, and the only way to break the curse is by mastering a specific and very difficult martial art form. So he travels to the far east in the Muggle world to seek out the masters of this art. Along the way, he learns about different cultures and makes new friends, all while trying to break the curse and return to Hogwarts in time to face his enemies.
Perhaps it's a magical crystal that enhances his ability to communicate with magical creatures. This would be quite unique as it would give him an edge in dealing with things like thestrals or unicorns, and open up new storylines in the fanfiction. Harry could use this crystal to understand their needs and gain their help in various situations.
In 'Harry Potter martial arts fanfiction', often the characters' personalities are developed in new ways. Hermione might learn martial arts to be more self - reliant, not just relying on her book knowledge. Ron could use his natural strength in martial arts. And the Hogwarts curriculum could expand to include martial arts classes, which is a whole new concept for the wizarding school. It also allows for different cultural elements to be introduced as martial arts come from various cultures around the world.
Perhaps he invents a spell called 'Transfigura-Shield'. This spell combines transfiguration and shielding magic. When cast, it can transform any nearby objects into a protective shield. For example, it could turn a pile of rocks into a solid stone wall to block incoming attacks.
In some 'Harry Learns the Dark Arts' fanfictions, there could be a plotline where Harry uses his newfound knowledge of the Dark Arts to fight against a new, more powerful dark wizard. He might have to walk a fine line between using the Dark Arts in a 'good' way and succumbing to its evil nature. His adventures in this regard could include learning how to counteract dark spells with his own dark - art - based magic, all while trying to keep his soul intact.
Maybe Harry Potter uses a magical device to learn advanced spells. For example, he discovers a time - turning quill that allows him to study ancient magic more efficiently.
In many of these fanfictions, Harry's discovery of alchemy is often a key plot point. For example, he might find a long - lost alchemy manuscript. Another interesting part is how he tries to combine alchemy with his existing magic knowledge. Sometimes, he uses alchemy to create powerful new potions or magical items.
Obviously, Harry Potter is the main character. He is the one who is learning the Dark Arts. Then there might be his friends like Hermione Granger and Ron Weasley. They could be either supporting his new path or trying to stop him. There may also be new characters created specifically for the fanfiction, such as a secretive Dark Arts master who takes Harry under his wing.
In a 'Peter Parker Learns Magic' fanfiction, perhaps Peter discovers magic because of a scientific experiment gone wrong that somehow bridges the gap between science and magic. He might then attend a secret magical school in New York, where he has to balance his studies in magic with his duties as Spider - Man. His new magical powers could include teleportation, which he uses to quickly get to crime scenes. He could also use magic to create illusions to deceive villains during battles.
It could be about Harry Potter learning some long - forgotten or lost magical arts. Maybe he discovers ancient spells, potion - making techniques that have been lost for centuries, or unique forms of divination that are no longer practiced in the wizarding world.
Well, maybe Harry Potter discovers an ancient magic that has ties to kung fu. He could start learning from a mysterious wizard who has mastered both magic and kung fu skills. He'd use his newfound kung fu moves along with his magic in battles against dark wizards.