He could find it in an ancient, hidden temple during one of his missions. Maybe he was exploring a long - forgotten ruin and stumbled upon the sword, completely by accident.
One plot idea could be that Naruto discovers an ancient scroll that reveals the secrets of the Benihime Sword. He then embarks on a journey to master its powers, facing various challenges along the way, like battling rogue ninja who also seek the sword's power.
There are so many 'naruto finds benihime fanfiction' out there that it's hard to say which are the best. However, look for stories that are well - developed in terms of plot and character. A story that delves deep into how Naruto reacts to finding Benihime and how it affects the Naruto universe is likely to be more interesting. Also, stories that are written by more experienced fanfiction authors often have better quality in terms of writing style and grammar.
One possible plot could be that Naruto somehow discovers Benihime, perhaps during a mission in a hidden area. He might initially be confused by its power but gradually learn to master it with his own unique chakra. This could lead to him developing new jutsu combinations, much to the surprise of his friends and foes alike.
We might expect a unique blend of the two elements. For instance, Naruto's scream could be used to power up Benihime in some way. This could be a new power - up method that the author invents for the story.
It could be a story where Naruto's scream has some sort of special effect on Benihime. Maybe his scream is so powerful that it activates a hidden ability of Benihime. For example, in a battle situation, Naruto's scream of determination causes Benihime to glow brighter and gain extra strength.
One place to find such fanfiction could be Archive of Our Own (AO3). It has a vast collection of Naruto - related fanfictions, and you might be able to search specifically for ones where Naruto finds Benihime. Another option is FanFiction.net, which also has a large number of Naruto fanfictions that could potentially include the scenario you're looking for.
A new and powerful ninja from a far - off land could be the main antagonist. This ninja has heard of Benihime's power and wants it for himself. He sees Naruto as an easy target at first but soon realizes that Naruto is not going to give up Benihime without a fight. This antagonist could have unique powers that are a challenge for Naruto to overcome while protecting Benihime.
There are a few out there. In some of these fanfictions, Naruto having Benihime might be part of a crossover concept. For instance, it could be a crossover with the Bleach universe where Benihime is from. This could bring in elements from both Naruto's world and the Bleach world, like different types of chakra interacting with spiritual energy. The story could also delve into the origin of Benihime in this new Naruto - centric context. It might rewrite Naruto's entire journey, making him a more complex and powerful character with the addition of Benihime.