I've read 'Naruto: Fire God Slayer's Ascent'. It's an interesting take. In this fanfic, the Fire God Slayer abilities are used to enhance Naruto's own fire - based jutsu. It has some really cool fight scenes where the combination of Naruto's normal ninja skills and the Fire God Slayer powers are shown off. It also delves into how the ninja world reacts to this new kind of power.
They often introduce new characters or give existing characters new abilities. It allows for different character development arcs. A fanfic might have Sasuke gain some Fire God Slayer abilities and see how that changes his relationship with Naruto and his own goals. This changes the dynamics of the story and makes it fresh compared to the original Naruto storyline.
Sasuke could be a great main character. Given his natural affinity for fire - based jutsu in the Naruto series, the addition of Fire God Slayer powers could make him even more formidable. He could use these new powers to seek revenge in a different way or to protect the village in a more powerful capacity.
A plot could involve a Fire God Slayer from another dimension accidentally ending up in the Naruto world. This character then has to find a way back home while also getting involved in the local politics and power struggles. They might use their Fire God Slayer powers to help the oppressed in the ninja villages, creating both allies and enemies along the way.
In this fanfiction, perhaps Sasuke could be a sort of anti - hero. He might initially be seen as a threat by the Demon Slayer corps because of his dark powers. But then, as the story progresses, he could use his Sharingan to detect demons more easily and work with the protagonists to defeat stronger demons.
One idea could be Natsu discovering new and more powerful fire-based spells as a Fire God Slayer. Maybe he has to face a powerful ice - based enemy that forces him to tap into deeper levels of his god - slayer magic. This would make for an exciting action - filled fanfiction.
One idea could be that Naruto discovers a hidden power within himself that is related to God Slayer Magic. This new power could change the way he battles enemies in the Naruto universe. For example, he might be able to use it against powerful foes like Madara or Kaguya, giving him an edge he didn't have before.
A possible fanfiction could involve Naruto learning Fire Devil Slayer Magic. Maybe he meets a character from the world of Devil Slayer who teaches him this magic. It could give him new powers and abilities, like the ability to control and manipulate fire in a different way compared to his normal jutsu.
Yes, there are quite a few out there. You can check some fanfiction websites like FanFiction.net or Archive of Our Own. Just search for 'fire dragon slayer naruto' on their platforms and you'll find various stories. Some might be crossovers that combine the elements of Naruto and the concept of a fire dragon slayer in really interesting ways.
One common theme is power growth. The Fire God Slayer characters often strive to become more powerful, whether it's to protect their friends or prove themselves. Another theme is friendship, as they interact with other Fairy Tail members and form strong bonds.