The goddess of time could be the key to unlocking an ancient prophecy in the Fairy Tail world. The Fairy Tail guild has to protect her from dark forces that want to use her power for evil. Along the way, they discover secrets about the origin of time in their world and how it is intertwined with their own magic.
Maybe the goddess of time gets trapped in a time loop within the Fairy Tail universe. As she tries to break free, she has to enlist the help of the Fairy Tail members. They go on various adventures to find the items or perform the spells needed to break the loop, all while facing their own personal challenges.
Natsu could be one of the main characters. His brash and adventurous nature would make for an interesting contrast with the more mysterious and powerful goddess of time. He might initially be skeptical of her power but then come to rely on it.
One idea could be a character traveling back in time to prevent a major disaster in the Fairy Tail world, like the destruction of a key guild building. This would involve them having to figure out the cause of the future event in the past and deal with the different versions of their friends and enemies at that time.
In 'naruto x ur fairy tail fanfiction', a great crossover idea could be the exploration of different worlds. Naruto's world of ninja villages and hidden powers could collide with Fairy Tail's world full of magic guilds. Characters might travel between these worlds and face challenges that require both ninja skills and magic. For instance, a group of Naruto characters could end up in the Fairy Tail world and have to learn about magic quickly to survive. Or vice versa, Fairy Tail mages could visit the ninja world and be amazed by the stealth and combat skills of the ninjas.
A plot could involve Natsu going back in time to a time of great danger for the guild, a threat that was previously unknown in the present. He has to use his present - day skills and knowledge to fight this threat. But he also discovers some secrets about the guild's founders and their powers that were lost over time. This knowledge could be crucial in not only saving the past but also making the present - day Fairy Tail even stronger.
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.
Another plot could involve Bardock having to adapt to the magic - based society of Fairy Tail. He might initially struggle with understanding how magic works, but then discovers a way to combine his Saiyan power with the magic there. For example, he could learn to use ki - based attacks in harmony with Fairy Tail's elemental magics. This would create a unique fighting style that surprises both his allies and enemies.
One idea could be a crossover adventure where characters from Fairy Tail and Negima team up to fight a common, powerful enemy. For example, they might face a dark wizard who has the ability to steal magic from both worlds.
One idea could be that the main couple from Fairy Tail goes on a honeymoon to a magical island. There, they discover a hidden ancient magic that they have to protect from villains who also find out about it. Another plot could involve them facing relationship challenges during the honeymoon, like misunderstandings due to magic gone wrong. For example, a spell makes one of them forget parts of their relationship, and they have to work through it to rekindle their love.
In a 'Fairy Tail WW2 Fanfiction', a possible plot could be that the guild discovers a hidden magical dimension that is somehow connected to the events of WW2. They enter this dimension to try and stop a dark force that is influencing the war from the shadows. Some of the characters could form alliances with real - life military personnel who are open - minded enough to accept their help. This would lead to interesting interactions between the magical and non - magical worlds during the war.
One idea could be exploring how the next generation of Fairy Tail wizards handle a new dark guild threat. They might have to combine the old and new magic techniques they've learned.