In this fanfiction, it could be that a powerful enemy from another dimension arrives. This enemy has the ability to turn living beings into weapons. They see Naruto as a prime target because of his strong chakra. Once turned into a weapon, Naruto might be used to break through the defenses of Konoha. His friends then have to find a way to reverse the transformation, which could involve a long and dangerous journey to find a special antidote or a powerful jutsu.
One possible plot could be that a dark wizard uses a powerful and forbidden spell on Harry. This spell alters his very essence and turns him into a weapon. He then becomes a tool in the dark wizard's hands to attack Hogwarts. But his friends, like Hermione and Ron, notice the change and try to find a way to reverse the spell. They search through ancient books in the restricted section of the library and finally discover a counter - spell.
One possible plot could be that Naruto, as a vampire, has to struggle with his newfound thirst for blood while still trying to protect the Hidden Leaf Village. He might have to find a way to control his urges so he doesn't harm his friends. Maybe he discovers some unique vampire abilities that he uses in combat, like super speed and enhanced strength, which could change the way battles play out in the Naruto universe.
Perhaps in this fanfiction, Naruto discovers that he has some unique weapon - like abilities that are different from his normal jutsu. It could lead to a whole new adventure where he has to learn to control this 'weapon' aspect of himself while still being true to his friends and the village.
Well, one possibility is that Naruto, turned into a wolf, might have to adapt to a new form and new abilities. He could use his wolf form to his advantage in combat, perhaps having enhanced senses like better smell and hearing. He might also face challenges in being accepted by his friends in this new form.
Maybe in this fanfiction, Naruto is separated from his normal friends and mentors. Instead, he is surrounded by cold - hearted trainers who see him as nothing but a tool. They might even suppress his emotions so that he can be a more effective weapon. He could be sent on dangerous solo missions where the sole objective is to eliminate the target using his new - found combat skills.
One possible plotline could be Naruto having to deal with the new social dynamics as a girl. For example, she might face different expectations from her friends and sensei. Another could be how she adapts to her new physical form during training, like how her changed body affects her chakra control. And also, there could be a romantic sub - plot where characters who were just friends before now see her in a different light.
In the 'percy is turned into a monster fanfiction', it could start with Percy being tricked by a powerful deity into becoming a monster. His transformation might be a way for the deity to use Percy as a weapon against other gods or demigods. Percy, in his monster form, has to fight against this control and find a way to break free. He might encounter other characters who help him understand his new form and use it to his advantage rather than being a slave to the deity's will. Along the way, he discovers new aspects of his identity and the world around him that he never knew before.
Perhaps it's a unique staff. A staff could have different uses, like being a conduit for chakra. It could also have hidden compartments or be made from a rare material that gives Naruto an edge in battles. For example, it might be made from a metal that can absorb chakra attacks and then redirect them.
In this fanfiction, perhaps Hinata discovers some unique power within Naruto that can be used as a weapon. Maybe Naruto has a special form or ability that only Hinata can unlock and utilize in battles against their enemies.
Well, a plot development could be that Naruto, as a Kitsune, discovers a hidden Kitsune society within the Naruto world. This society has its own rules, hierarchies, and secrets. Naruto would have to navigate through this new world while still holding onto his values as a ninja. He could learn unique Kitsune techniques and magic that could be used to protect his village. And perhaps there's a prophecy in the Kitsune society that Naruto is meant to fulfill, which would add an element of destiny to the story.