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.
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.
It could be a powerful jutsu. Since Shinigami is often associated with death and the afterlife in the Naruto universe, the gift might be a jutsu related to death or soul manipulation.
Well, he might gain some really cool and spooky powers. Maybe he could have the ability to manipulate souls like the Shinigami does. This could give him an edge in battles, being able to directly attack an opponent's soul or use soul - based defenses.
Well, if Naruto gets all the doujutsu in fanfiction, it would completely change the Naruto universe's power dynamics. He might gain new insights into the nature of chakra and the world. With the doujutsu, he could potentially unlock new forms of jutsu or even find a way to combine the abilities of different doujutsu. For example, using the Sharingan's genjutsu capabilities along with the Byakugan's field of vision to create a super - powerful combat strategy. It would also probably change his relationships with other characters, as they would view him as an even more formidable force.
One possibility is that Naruto's new doujutsu gives him the ability to see chakra in a whole new way. He could use this to detect hidden enemies or weaknesses in his opponents' jutsu. For example, he might be able to see the flow of chakra in a genjutsu and easily break it.
It could be a sword. In many fanfictions, swords are common powerful weapons. Since the Shinigami is often associated with death and power, a sword with special abilities like being able to cut through spiritual barriers or absorb chakra could be a likely weapon for Naruto to obtain.
He could get a Dojutsu that allows him to manipulate time. This would be a very powerful ability as he could slow down or speed up time during battles. For instance, he could slow down time to dodge an enemy's attack and then speed it up to counterattack.
Well, it could make him an even more powerful ninja. The Dojutsu might give him new abilities like enhanced perception, the ability to see chakra more clearly, or even some kind of special attack. For example, if it's a Dojutsu similar to the Sharingan, he could potentially copy jutsu more easily.
He would become more confident. Having a new and powerful ability would boost his self - assurance. He might be more willing to take on tougher opponents and challenges.