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.
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.
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.
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.
Well, perhaps Naruto takes Zabuza's sword and it becomes a symbol of his growth. He may face challenges from those who think he's unworthy of possessing such a weapon. Also, he could modify the sword to better suit his fighting style, like adding some of his own chakra -infused elements to it.
Power and its consequences are often explored in 'naruto momochi fanfic'. Given his status as a powerful ninja, fanfics tend to look at how his power affects those around him and how he uses or misuses it. Also, the theme of friendship or comradeship is there. Even though he was initially presented as a lone wolf, fanfics might show him forming unexpected bonds. For example, in some fanfics, he teams up with Naruto and his friends and through that, we see a different side of him.
One common theme is redemption. Given his past as an assassin, many fanfictions focus on Momochi Zabuza finding a way to atone for his sins. For example, he might take on a mentorship role for a young ninja, guiding them to a better path while also seeking his own salvation.