One possibility could be that Naruto discovers a hidden ability within himself to use Wood - Style Treant Jutsu. Maybe he unlocks it during a life - threatening battle where he needs to protect his friends. He could combine his own chakra with some ancient energy source in the forest to create these powerful treant - like creatures that fight on his side.
The fanfic could start with Naruto having a strange dream about using Wood - Style Treant Jutsu. He wakes up curious and starts to experiment. He finds that he can transfer his own emotions into the treants, making them more aggressive or defensive depending on how he feels. As he gets better at it, he uses the jutsu in a major battle against a group of rogue ninjas who are terrorizing a village. His treants become a symbol of hope for the villagers as they fight off the invaders.
The Treant could have the ability to absorb and store chakra from the environment. Just like real trees absorb sunlight and nutrients, this Treant made by Naruto could soak up ambient chakra, making it stronger over time. It could also use its branches to perform long - range attacks, similar to how a ninja would use kunai or shuriken. And, it might be able to camouflage itself as a normal tree in the forest, giving Naruto an element of surprise in battle.
Well, in the Naruto universe, for Naruto to make a Treant Jutsu, he might first need to study nature chakra deeply. He could observe how trees grow and thrive, and then try to infuse his own chakra with the essence of nature. Maybe he'd have to combine his shadow clone jutsu in a new way, having clones study different aspects of trees, like their root systems and how they absorb nutrients. Then he could use his Rasengan as a base and add the nature - based tree - like elements to it, gradually forming a Treant - like structure out of his chakra.
A fanfic could also explore Naruto using the Smoke Jutsu for a rescue mission. Suppose some of his friends are trapped in a building surrounded by enemies. Naruto uses the Smoke Jutsu to cover the area. The smoke is so thick that the enemies can't see. Then he sneaks into the building, rescues his friends, and they all escape under the cover of the remaining smoke.
In the fanfic, Naruto shows his genius by quickly inventing and perfecting complex jutsu that others struggle with.
Sure. In fanfiction, the rules can be bent or rewritten. Maybe Naruto discovers a hidden bloodline connection that enables him to use Wood Style. It could be that he has a distant relation to the Senju clan that was previously unknown. This new ability would change the dynamics in battles and his relationships with other characters like Sasuke and Sakura, as he would have a whole new set of skills to bring to the table.
One way could be through a special training with a character who already has Wood Style or knowledge of it. For instance, if Yamato decided to train Naruto intensively in Wood Style techniques.
Well, in a 'naruto therapy jutsu fanfic', it might be centered around how the ninja world lacks proper mental health support and so someone invents this therapy jutsu. For example, Sakura, being a medical ninja, could expand her skills to include a therapy jutsu that not only heals the body but also helps with things like PTSD that ninjas might suffer from due to the constant battles and traumas they face. It could also explore how different characters react to this new form of treatment.
A 'naruto kawaii no jutsu fanfic' is likely a fan - made story related to Naruto's 'Kawaii no Jutsu'. It might focus on how this jutsu affects different characters in the Naruto universe. Maybe it shows some comical situations where Naruto uses the jutsu in unexpected ways or how it changes the relationships between characters.
I'm not sure specifically as I haven't read that particular fanfic. But generally, the Oiroke no Jutsu in Naruto is a transformation jutsu used by Naruto. A fanfic about it might explore different scenarios related to how the jutsu is used, its impact on the characters around, or might even be a comical take on it.