There are several Saiyan abilities that could work well in a Fairy Tail fanfiction. For starters, the Saiyan's zenkai boost. Every time a Saiyan is near death and recovers, their power increases. This could be an interesting plot device in the fanfic. Also, Saiyans have a natural affinity for combat and can quickly analyze an opponent's fighting style. In Fairy Tail, this could make the Saiyan character a formidable ally in battles against various foes. Their ki sense, which allows them to detect the power levels of others, could also be used to detect hidden enemies or magic sources in the Fairy Tail universe. And of course, their iconic Saiyan rage - when a Saiyan gets angry, their power spikes. This could be a great source of drama and power - ups during intense story moments in the fanfiction.
One possible plot could be that Naruto is somehow transported to a world where Saiyan powers and Fairy Tail magic exist. He might start off as an outcast, not understanding these new powers at first. But as he trains and learns, he combines his ninja skills with Saiyan strength and Fairy Tail magic to become a powerful force and fight against an evil that threatens all three aspects of this new combined world.
One way could be through a crossover spell. Maybe a powerful mage in Fairy Tail accidentally creates a portal that brings Vegito into their world. Then Vegito's incredible power would be a huge shock to the Fairy Tail guild, and he could either be an ally or a misunderstood foe at first.
One way could be through a magical portal. Maybe a powerful mage in Fairy Tail accidentally creates a portal that links to the Naruto universe and Madara somehow gets sucked through it. Then he could use his powerful jutsu in the Fairy Tail world, creating all sorts of chaos and new storylines.
Well, it could be that a character from Fairy Tail somehow travels to the Naruto world and acquires the Rinnegan. Then, when they return to their own world, they have to adapt it to the magic - based system. They might find that the Rinnegan's abilities interact strangely with their own magic, creating new and unexpected effects.
He could gain the ability to copy magic. Since the Sharingan can copy techniques in Naruto, Natsu might be able to do the same with magic in Fairy Tail. So if he sees an enemy using a water - based spell, he could potentially copy it with the help of the Sharingan.
Yes, there are likely fanfictions out there with such a concept. The world of fanfiction is vast and full of creative crossovers. Writers often combine different popular franchises like Naruto, Saiyan from Dragon Ball, and Fairy Tail to create unique and interesting stories. However, the quality can vary greatly, from amateurish attempts to really well - written and engaging pieces.
A Saiyan's high power level could potentially disrupt the balance in the Fairy Tail universe. Saiyans are known for their extreme combat capabilities. Their power could either be seen as a great asset or a huge threat. For example, in battles against the dark guilds, a Saiyan's raw strength might make short work of the enemies. However, their power might also attract unwanted attention from powerful foes or even make some in the Fairy Tail guild uneasy due to the potential for destruction.
Well, a very frequent theme is friendship. Just like in Fairy Tail, where friendship is super important, in these fanfictions, the Saiyan OC usually makes friends in the guild. And also, the theme of self - discovery is common. The Saiyan OC discovers new abilities or a new purpose while being in Fairy Tail. For example, they might find that their Saiyan powers can be combined with magic in a way they never thought of before.
One interesting story could be about a Saiyan character who ends up in the Fairy Tail world and has to adapt to the magic there. Maybe they use their Saiyan strength in combination with Fairy Tail magic to fight powerful enemies.
One possible ability could be the power to manipulate time. Just like Doflamingo's string powers in One Piece, but applied to time. A character in Naruto fanfiction with this Devil Fruit ability could slow down or speed up time during battles. This would give them a huge advantage, as they could dodge attacks easily or land multiple strikes while the enemy is frozen in time.