Well, in the fanfiction, the rare sword might have some sort of special power. It could be linked to an ancient ninja clan. Naruto might have to go on a quest to discover the true nature of the sword and how to fully utilize it. This could lead to him making new allies or enemies along the way.
Well, he might gain access to super powerful summons that no one has ever seen before. These could give him an edge in battles, like against the Akatsuki.
One possible fanfiction could be about Naruto finding a sword that has a special connection to the Sage of Six Paths. Maybe the sword has the power to enhance his Rasengan or even cut through dimensions. It could also have a mind of its own and initially resist Naruto, but over time they form a bond.
In many fanfictions, Naruto might obtain the Uzumaki sword through a hidden inheritance. Maybe it was left behind by an ancient Uzumaki clan member and Naruto discovers it in a secret location, like an old, forgotten Uzumaki shrine.
One possible plot could be that Naruto discovers a magical sword. This sword might have special powers like being able to cut through any jutsu. He then has to learn how to master it, which could involve going on a journey to find an old hermit who once used the sword. Along the way, he faces challenges from enemies who also want the sword for their own evil purposes.
Naruto's relationship with the village elders could change. They might be cautious about Naruto having such a powerful and potentially dangerous item. They could try to restrict his use of the sword or keep a closer eye on him. But Naruto, being the free - spirited ninja he is, would likely resist these restrictions if he felt they were unjust. This could lead to some political tensions within the village as Naruto tries to balance his loyalty to the village and his new - found power with the dragon sword.
The sword might also have a connection to the spirit world. It could allow Naruto to communicate with the spirits of the Uzumaki clan or gain insights from their past. This would give him an edge in battles as he could learn from the experiences of his ancestors.
Well, Naruto could have a powerful new ally. The sentient sword might be able to communicate with Naruto, giving him advice in battles. It could also have special abilities like being able to cut through any material, which would be a great advantage for Naruto.