naruto has a powerful sword fanfiction

Well, in some fanfictions, he might inherit it from an unknown ninja clan. Maybe his parents left it for him and it was hidden until he discovers his true heritage.

It could be an old sage. There are often sages in the Naruto world who have access to powerful artifacts. An old sage might see Naruto's potential and give him the weapon to help him in his fight against evil.

It might change his fighting style significantly. Instead of relying solely on his ninjutsu and taijutsu, he would now incorporate swordsmanship. This would require him to train in a different way and develop new skills. Also, the sword could give him an edge in battles, allowing him to defeat opponents he previously couldn't. For instance, against opponents with strong defenses that his normal attacks couldn't penetrate, the sword could be the key.

It could be a super - charged kunai. Maybe it has some kind of special chakra - enhancing ability that makes Naruto's attacks much more powerful than normal.

Well, in some fanfictions, Naruto might obtain the overpowered sword through a mysterious inheritance. Maybe it was left by a powerful ninja from the past and Naruto discovers it in a hidden cave or something.

Well, in some fanfictions, Naruto might obtain the Master Sword through a strange portal that connects his world to the world where the Master Sword exists. Maybe he's on a mission and stumbles upon it by accident.

In some fanfictions, Naruto might obtain the dragon sword through a special quest. Maybe he stumbles upon an ancient temple during one of his missions where the sword is hidden as a powerful artifact, guarded by some kind of magic or traps. He overcomes these obstacles using his ninja skills and determination, and thus gets the dragon sword.

Well, in some fanfictions, Naruto might obtain the Sword of Tengu through a quest. Maybe he has to help a spirit or an ancient being in return for the sword.

One possible ability could be enhanced cutting power. It can slice through the toughest of materials, like it's cutting through butter. For example, it could easily cut through solid rock or even chakra - enhanced defenses.

Maybe it has the ability to absorb chakra. So when Naruto is in a fight against an opponent with a large amount of chakra, he can use the sword to drain some of that chakra, weakening the enemy while strengthening himself. The sword could then store that chakra for later use, like to boost Naruto's own attacks.