The fanfic might focus on the power and danger of the ancient nuclear weapon. It could show how its existence changes the power dynamics in the RWBY world. For example, various factions might fight over control of the weapon. The characters in RWBY would then be caught in the middle of this power struggle, having to decide which side to support or if they should try to destroy the weapon altogether to prevent a catastrophic war.
Perhaps the fanfic delves into the backstory of the ancient civilization that made the nuclear weapon. It could explore their motives, their technology, and how their society functioned. The RWBY characters could then learn from this ancient civilization's mistakes. They might discover that the weapon was created out of fear and desperation, and they would strive not to make the same choices in their own fight against evil, instead relying on their own unique abilities and teamwork.
Ruby could be one of the main characters. Given her leadership skills and her inquisitive nature, she would be drawn to the mystery of the ancient nuclear weapon. She might see it as a potential solution to the Grimm problem or, on the contrary, as a great danger that needs to be stopped.
Start with a mystery. For instance, have an ancient weapon suddenly appear or show signs of awakening. This will draw readers in as they want to know more about the weapon. Then, introduce characters with different motives regarding the weapon. Some may want to use it for good, while others for evil.
Another interesting approach is to have a character bond with an ancient weapon in a unique way. For example, a character might find an ancient weapon that seems to have a mind of its own. As they interact, the weapon reveals its powers and secrets only to that character, and they form a special alliance to face a great threat in the RWBY universe.
Well, one idea could be the use of nuclear energy in the RWBY universe to power new types of weapons. For example, a weapon that harnesses nuclear fusion to create extremely powerful blasts. Another could be the exploration of how nuclear power affects the Grimm. Maybe the radiation from nuclear sources either attracts or repels them in unique ways.
It's hard to say without actually reading the fanfic, but most likely the main characters from RWBY, like Ruby, Weiss, Blake, and Yang, would be involved. They might be the ones dealing with the new nuclear elements introduced in the fanfic.
Well, they might be really shocked at first. Nuclear power is a very complex and powerful concept. Ruby, being the innocent and curious one, could be full of questions. She might ask things like how it works and if it's dangerous. Weiss, on the other hand, would probably try to analyze it from a more scientific perspective. Blake might be a bit more reserved but still intrigued, and Yang would probably be excited about the potential power it represents.
Perhaps in the fanfic, Percy is a weapon in the sense that he is the key to activating a super - powerful ancient weapon. The gods and goddesses are all vying for control over him because they know that with Percy, they can wield this ultimate weapon. Percy has to navigate through political intrigue among the deities while also trying to figure out his own role in this whole mess.
The plot could involve a common enemy that threatens both the RWBY world and Konoha. So, the characters from RWBY and the ninjas of Konoha have to team up. For example, Salem's forces could somehow cross over into the Naruto world. The ninjas would be amazed by the unique abilities of the RWBY characters like semblances. In turn, the RWBY team could learn about chakra and ninjutsu. This would lead to some interesting training sessions and battles where they combine their powers in creative ways.
Well, in this fanfic, perhaps Minato turns Naruto into a weapon because of a dark prophecy. Minato thinks that by making Naruto a weapon, he can prevent the prophecy from coming true. So he trains Naruto in a very different way, focusing more on raw power and combat efficiency. Naruto starts to show less of his usual goofy self and more of a cold - blooded fighter. His friends are worried about him, but Naruto believes he's doing the right thing for the village. Eventually, Naruto might have to face a choice between being a weapon or reclaiming his old self.
Well, it could be about Ruby discovering her Saiyan powers. Maybe she starts to show super strength and speed like a Saiyan. She could use her scythe in new and powerful ways, inspired by Saiyan combat styles.