The story could explore how Naruto adapts to having a weapon like Zabuza's sword. Since Naruto is used to his own hands - on combat and ninjutsu, the sword would be a new addition. He would have to train to master it. Maybe he'd seek out old friends or allies of Zabuza to learn more about the sword's history and proper use. This could open up new storylines and relationships for Naruto in the fanfic world.
Some of his friends might be worried at first. They know Zabuza was a dangerous enemy before. But Naruto could convince them that he'll use the sword for good.
Well, it could make Naruto's fighting style more aggressive and direct. With Zabuza's sword, Naruto might incorporate more slashing and close - combat moves. He could use his shadow clones more effectively in combination with the sword, like having clones surround the enemy and then attacking from different angles with the sword.
A minor character like a blacksmith's apprentice could find Zabuza's sword. Instead of using it for fighting, they study it closely. They discover a unique metal alloy in the sword that they use to create new and improved weapons for their village. This not only changes their own fate as they become a renowned blacksmith, but also the fate of the village as they now have better weapons to defend themselves.
Well, another place could be Naruto - related forums. There are often threads where fans share and discuss their favorite fanfics. Some might be specifically about Zabuza's sword. You can join in the conversation and ask for recommendations too.
One possible consequence could be that Naruto gains a new and powerful weapon. This sword might have unique abilities that could enhance his combat skills. He could use it to intimidate his enemies or as a last - resort weapon when his regular jutsu are ineffective.
Good writing style also matters. The descriptions of the sword, like its appearance and the way it cuts through things, should be vivid. If the author can make you feel like you're right there in the Naruto universe, watching the sword in action, then it's a great fanfic. Also, it could explore the backstory of the sword in more detail than what was shown in the original series, which would make it really engaging for fans.
Another plot could be that Zabuza's sword ends up in the hands of an enemy of Konoha. Konoha sends a team of ninjas, including some of the younger generation like Naruto and his friends, to retrieve it. Along the way, they learn about Zabuza's legacy and the true strength of the sword. They have to battle the enemy who has already started to unlock some of the sword's powers, but in the end, they manage to get it back and decide what to do with such a dangerous weapon.