They might obtain new doujutsu powers through genetic experiments. In some fanfictions, evil scientists or rogue ninja might try to combine different bloodlines to create a new and powerful doujutsu. Another way is through a divine encounter. For example, a character could be blessed by a god - like entity in the Naruto universe and be given a new doujutsu power.
Identity is also a common theme. Discovering a new doujutsu can change how a character sees themselves. They might be an outcast before, but with the new doujutsu, they become a key figure. And there's often the theme of mystery. Where did the new doujutsu come from? What are its limits? These are all questions that are explored in 'naruto new doujutsu fanfiction'.
Another might be the Byakugan. It gives a wide - range view and can see the chakra points in the body. In fanfiction, new and unique abilities of these doujutsu can be explored. For example, the author might create a situation where the Sharingan can not only copy physical techniques but also mental jutsus.
One possible doujutsu could be a time - manipulating doujutsu. It allows the user to slow down or speed up time in a small area, giving them an edge in battles. Another could be a soul - reading doujutsu, which enables the user to see the true intentions and past experiences of others by looking into their souls.
The doujutsu can drive the plot by giving characters unique powers. For example, if a character has a powerful doujutsu, it can make them a target for other characters who want to either steal the power or use it for their own purposes.
In the fanfiction, it could be that Naruto inherits the doujutsu. There might be a hidden lineage that Naruto is a part of, and when the time is right, the doujutsu awakens within him. This could be related to his Uzumaki heritage, which has many secrets yet to be fully explored. It's possible that some long - lost relative had this doujutsu and it has been passed down through the generations, finally emerging in Naruto.
Naruto's understanding of the ninja world would deepen. With the new doujutsu, he could see things that were hidden from him before. This would make him more aware of the politics and power struggles in the ninja villages. He might start to question some of the long - held beliefs and traditions. He could also use his new insights to try and bring about positive change in the ninja world, like finding ways to end the cycle of hatred between different clans.
One idea could be that the new doujutsu is related to time. Naruto can then see events from the past and future. This would be a huge advantage. He could learn from the mistakes of his predecessors, like Hashirama and Tobirama. Also, he could foresee the plans of his enemies and be better prepared for battles. He might see that Orochimaru is planning a new experiment in the future and stop it before it starts.
One of the popular 'naruto new doujutsu fanfiction' works is 'The New Doujutsu Awakening'. It focuses on a new type of doujutsu that emerges in the Naruto world. Another great one is 'Doujutsu Revolution' which explores how this new doujutsu changes the power dynamics among the characters.
The doujutsu from kami might also grant Naruto new offensive capabilities. It could potentially allow him to use some sort of energy projection or manipulation that is unique to this doujutsu. For example, he could fire beams of spiritual energy that can disrupt an opponent's chakra system.