One possible plot could be that Naruto's new doujutsu gives him the ability to see the chakra flow in a more detailed way. This would enhance his combat skills as he could predict his opponents' moves better. He might also use it to understand the nature of different jutsus more clearly.
His relationship with the older generations like Kakashi and Tsunade could shift. They would see Naruto as a more mature and capable ninja. Naruto could use the insights from his doujutsu to contribute more to the decision - making in the village, and they would respect his opinions more.
It could be a doujutsu that allows him to see the future in fragments. So he can get glimpses of his opponents' next moves or potential threats in the near future.
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.
Maybe a magical amulet. This amulet could have special powers like protecting Naruto from genjutsu or enhancing his chakra control. Since Kami is a powerful entity in the Naruto universe, it makes sense for the gift to have some kind of extraordinary ability.
The symbiote might also have an impact on Naruto's personality. Since symbiotes often have their own sort of consciousness, it could lead to some internal conflict within Naruto. He might have to struggle to keep his own values while dealing with the symbiote's influence. On the other hand, if he can master it, he could gain a new level of confidence. Maybe it would give him an edge in his battles against stronger opponents like Sasuke or the Akatsuki members.
Well, if Kami gives Naruto a bloodline in fanfiction, it could completely transform his abilities. He might gain powers that are way more unique and powerful than his normal jutsu. For example, he could have some sort of elemental bloodline that allows him to control a new type of energy. This would make him even more of a force to be reckoned with in battles against tough opponents like Sasuke or the Akatsuki members.
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.
Well, it could enhance his perception abilities. With a doujutsu, Naruto might be able to see chakra flow more clearly. This would help him in combat as he could anticipate his opponents' moves better. He could also detect hidden traps or enemies more easily, giving him an edge in dangerous situations.