A great opening for a Fairy Tail fanfiction could be set in a time of crisis for the guild. Perhaps an ancient evil has been awakened and the guild is in disarray. The opening could show the guild hall in a state of chaos, with members arguing about what to do. Then, a young and inexperienced member steps forward with an idea that might just save the day, setting the stage for an epic adventure.
A great plot idea for Fairy Tail fanfiction could be that a mysterious force starts stealing the magic of all the mages in Fiore. The Fairy Tail guild has to team up with other guilds, including their rivals, to find out who or what is behind it. Also, you could have a plot where one of the main characters loses their magic completely and has to find a new way to be part of the guild and fight. Maybe they discover a hidden form of non - magical combat that still uses the spirit of Fairy Tail. Another plot could be that an otherworldly being comes to Fiore and challenges the strongest mages, including those from Fairy Tail, to a tournament to decide the fate of the world.
One idea could be Wendy going on a solo adventure to a far - off land in the Fairy Tail universe to discover a new type of magic. She could meet unique characters and face challenges that test her skills and growth as a mage.
A good crossover idea is to have a character from Ben 10, like Gwen, use her magic to help the Fairy Tail guild in a difficult situation. Maybe there's a dark magic that only Gwen can counter because of her unique powers. Or, have the Plumbers from Ben 10's world come to the Fairy Tail world to investigate some strange energy readings that turn out to be related to a powerful magic item in Fairy Tail.
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.
One idea could be exploring an alternate universe where the main characters have different magic abilities. For example, Natsu could have ice - based magic instead of fire. Another idea is to focus on the backstories of the minor characters in more depth, like how they came to join Fairy Tail. A third idea would be to create a time - travel fanfiction where characters go back in time to change a significant event in the Fairy Tail world.
One idea could be exploring an alternate universe where the main characters have different magic powers. For example, Natsu could have ice - based magic instead of fire. Another idea is to focus on a backstory for a minor character, like how they came to join the guild. Maybe a story about a character's journey to find a long - lost magical artifact that has a connection to Fairy Tail's history.
You could write a Fairy Tail fanfiction centered around a character's growth. For instance, take Wendy. You could write about her journey to master new and powerful dragon - slayer magic, facing challenges that force her to grow not only in power but also in confidence and leadership skills. It could involve her going on a solo adventure to a far - off land to learn from a reclusive dragon.
One idea could be a time - travel fanfic where a character from Fairy Tail goes back in time and has to prevent a major disaster that would change the future of the guild. Another is a fanfic where the Fairy Tail members have to team up with their enemies to fight a greater evil that threatens the entire magical world. You could also do a fanfic about a character's origin story that wasn't fully explored in the original, like how Erza got her first set of armor.
One idea could be a new character arriving at Fairy Hills and having to adapt to the unique living situation. They could face challenges like getting along with the different personalities of the Fairy Tail mages living there.
One idea could be to set the Fairy Tail characters in a modern-day high school. Natsu could be the trouble - making but kind - hearted delinquent, and Lucy could be the new student who gets drawn into his wild adventures. Another idea is to have them in a modern city where magic is a secret but still exists, and they have to fight against an evil corporation that wants to use magic for their own gain.