Perhaps it's through a special encounter. He could meet an ancient being or a powerful sage who reveals the existence of this new element to him. The being might see Naruto's potential and decide to guide him in unlocking this new power. This would also introduce new characters and lore to the fanfic.
Maybe it's a time - based element. Naruto could use this new element to manipulate time in a limited way. For example, he could slow down time for his opponents during a fight, giving him an edge. This would add a whole new dimension to his combat abilities.
One idea could be a story where a new character discovers they have a unique fire - based ability that is different from the typical fire jutsu in Naruto. They could struggle to control it at first, causing chaos in their village, but then learn to harness it with the help of an old master.
I'm not entirely sure specifically as it could be many things. It might be a fanfiction where Naruto has god - like powers related to an 'element 115'. This could be a made - up or very creative take on Naruto's abilities, perhaps introducing a new power source or type of jutsu.
First, decide on the main character. If it's an existing Naruto character, think about how you can expand on their relationship with the fire element. For example, if it's Sasuke, you could explore how his use of fire changed after certain events. Then, create a conflict. It could be an external threat like a new enemy with a counter to fire jutsu, or an internal struggle like a character losing control of their fire element.
There might be a 'element naruto fanfiction' where the elemental nature of chakra is explored in a different way. For example, characters are born with an ability to control elements in a more instinctive and powerful manner. In this story, Naruto could learn from these characters to enhance his own elemental skills. It could involve a lot of training sequences and battles where the new understanding of elements gives him an edge.
Often in 'naruto element master fanfic', there could be a young, up - and - coming ninja as the main character. This character might start off as a novice in element control but has great potential. They could meet and learn from some of the older, more experienced Naruto characters. For example, they might train under Kakashi to better understand how to master different elements. And there could be an antagonist who also has strong elemental powers and is trying to use them for evil purposes, creating a conflict in the story.
One popular 'narusaku' fanfic with a 'lemon' aspect could be 'Sakura's Hidden Desires'. It delves into the relationship between Naruto and Sakura in a more mature way while still staying true to their characters. It has some really well - written emotional scenes along with the 'lemon' parts that add an extra layer of intensity to their relationship.
It could be the center of a power struggle. Different ninja groups or characters might want the Raijin Sword for themselves. Some may want it for its power, while others may want to keep it out of the wrong hands. This can create a lot of conflict and drama in the fanfic. The main character could be caught in the middle of this struggle, either trying to protect the sword or having to decide who is worthy of wielding it.
I'm not sure if there is such a specific fanfiction that combines all three elements precisely. Fanfiction can cover a vast range of creative combinations, but this one seems rather niche. It's possible that some dedicated fanfic writers might have experimented with it, but it would take some in - depth searching through fanfiction platforms to know for sure.