One idea could be a crossover where the characters from Harry Potter enter the world of fairy tales. For example, Harry could find himself in a twisted version of Cinderella's story, having to use his magic to solve the mystery of a dark force that's preventing the happy ending. Another could be creating a new character who is a fairy with unique magic abilities and how they interact with the Hogwarts students.
One idea could be a crossover where Harry Potter characters end up in the world of Fairy Tail. For example, Harry could join a Fairy Tail guild and use his magic alongside the mages there. Another could be a story where the magic systems of both universes are combined, creating new and unique spells.
One idea could be a crossover where characters from Harry Potter and Fairy Tail meet in a magical realm. For example, Harry Potter characters could visit the Fairy Tail guild and interact with the mages there. They might learn new magic spells from each other.
Maybe a fanfic where the Sorting Hat from Harry Potter is brought to Fairy Tail. The guild members could be sorted into Hogwarts houses based on their personalities. Natsu might be a Gryffindor because of his courage, while Lucy could be a Ravenclaw for her intelligence. This could lead to some interesting interactions and competitions within the guild as they explore the different aspects of the Hogwarts houses.
Another interesting plot could be a young wizard who is initially not good at traditional magic but has a natural talent for music magic. They struggle to be accepted in the Fairy Tail guild at first because their magic is so different. However, as they grow and develop their skills, they end up saving the guild from a powerful enemy using their music magic in a very unexpected way.
A fanfiction could center around a young wizard who is a master of sand magic but comes from a far - off land. They join Fairy Tail to learn more about their magic and end up getting involved in all sorts of adventures, using their sand magic to create unique defenses and attacks. Their sand magic could also have the ability to transform into different shapes, like sand dragons, which adds an interesting element to the battles in the story.
A plot could revolve around an ancient lost magic that was once used to seal away a great evil. Now, the seal is weakening, and the Fairy Tail wizards have to find a way to either re - strengthen the seal or completely destroy the evil using the very lost magic that sealed it in the first place. They'd have to search for clues about this magic in long - forgotten places and face many challenges along the way.
One idea could be to create an alternate version where a new, mysterious guild enters the Grand Magic Games. This guild could have unique magic that no one has seen before, which would add an element of surprise and intrigue. For example, they might have magic related to time manipulation, allowing them to rewind or fast - forward events during the games.
One idea could be a new student arrives at the Fairy Tail Magic Academy with a mysterious and powerful magic that no one has seen before. This causes a stir among the students and faculty alike. The new student has to learn to control their magic while also dealing with the various cliques and rivalries at the academy.
Another plot could revolve around the origin of Dragon Slayer magic. Maybe a long - lost scroll is found that reveals secrets about how the magic was first created and what its true purpose was. This could lead the Dragon Slayers on a quest to find out more about their powers and their connection to the dragons.
You could do a time - travel fanfiction. Have a character go back in time to when the Fairy Tail guild was first founded and see how they interact with the founders. Or, write a story where the characters swap powers. So, Erza would have Lucy's celestial magic and Lucy would have to use Erza's requip magic. This would lead to a lot of comical and also challenging situations for them. Also, you could write a fanfic about the guild taking on a mission in a completely new and strange land, filled with magic they've never seen before.