In the fanfiction where Naruto makes a buster sword, how does he obtain the materials to make it?

He might use chakra - infused metals. Since in the Naruto universe, chakra can be imbued into objects to give them special properties. Maybe he finds some rare ores from the Hidden Stone Village mines which are known for their strong and durable minerals.

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.

Well, in some fanfictions, Naruto might get the Buster Sword through a special encounter. Maybe he stumbles upon it during a mission in an ancient ruin. Another possibility is that it could be given to him by a powerful ally who has connections to the world where the Buster Sword originally comes from.

Well, he might obtain it in a fight. Maybe after defeating an enemy who had stolen Zabuza's sword from its original place. Or perhaps he discovers it in an old, forgotten hideout where Zabuza once stashed his things.

He might infuse the sword with his chakra. Since Naruto has a large amount of chakra, he could make the Buster Sword glow with his unique chakra color. This would not only make the sword stronger but also give it new abilities. For instance, the chakra - infused sword could cut through stronger defenses or even repel enemy ninjutsu.

It could have the power to cut through almost anything. Since Naruto is a powerful ninja, the sword might inherit some of his chakra's strength, allowing it to slice through thick barriers or even powerful jutsu defenses.

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.

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.