It could make him more confident. Having such a powerful weapon like Kubikiribocho at his disposal gives him an edge, so he may act more boldly in battles.
A plot could be where an enemy uses the Kubikiribocho to cause chaos and Naruto has to find a way to stop them. He might need to team up with some unexpected allies and figure out the weaknesses of the weapon. He could also try to find a way to sever the bond between the enemy and the Kubikiribocho.
One interesting Kubikiribocho Naruto fanfiction could be about how Naruto discovers an ancient and powerful Kubikiribocho and has to master its use. Maybe it gives him new abilities that he has to learn to control in order to face a new threat in the shinobi world.
One possible scenario is that Naruto uses the Kubikiribocho to face off against stronger opponents. He could use it to surprise his enemies who are used to his regular attacks. Another scenario is that he might have to protect the weapon from those who want to steal it for their own evil purposes. And perhaps he'll learn some new skills related to the weapon from an unexpected source, like an old hermit who knows the secrets of Kubikiribocho.
The fanfic could also be centered around a character who is in possession of the Kubikiribocho and Naruto has to face off against them. It could explore themes like power, loyalty, and the consequences of using such a powerful weapon. There might be moral dilemmas for Naruto as he decides how to deal with the wielder of the Kubikiribocho.
One possible plot could be Sakura using the kubikiribocho to defend her village or friends. She might face powerful enemies and have to master the weapon quickly.
One idea could be exploring the origin of the Kubikiribocho. Maybe it was crafted by a long - forgotten clan with special powers, and Naruto discovers hidden inscriptions on it that lead him to a new jutsu. Another could be a story where Naruto has to fight an enemy who has also mastered the use of a similar - looking weapon, and through the battle, he learns new ways to use the Kubikiribocho.
If Naruto wields Kubikiribocho in fanfiction, it would be a game - changer. The weapon's unique abilities, like its cutting power and possible hidden techniques, would enhance Naruto's combat capabilities. It could also lead to some interesting character development. Maybe Naruto would struggle with the violent nature of the weapon at first, as he is a character who values life. This internal conflict could add depth to his character and make the fanfiction more engaging.
Hermione could study the Kubikiribocho. She would pour over books in the Hogwarts library to figure out its origin and powers. Harry, on the other hand, might be the one to actually pick it up and test its abilities in combat. Ron could be a bit skeptical at first but would come around when he sees the sword's potential against the dark forces. For example, the sword might react differently to different spells cast at it. Harry could learn to use these reactions to his advantage in battles.
One possible plot could be that the Kubikiribocho, the sword in Naruto, somehow finds its way into the Harry Potter universe. Harry discovers it during one of his adventures in the Forbidden Forest. He initially has no idea how to use it but gradually realizes it has some unique powers that can be harnessed against Voldemort. For example, it might be able to cut through dark magic spells. However, there are also some negative aspects to the sword as it tries to corrupt Harry a bit, just like the influence of the Horcruxes. Harry has to fight against this internal battle while also using the sword's power to defeat Voldemort.