In this fanfiction, the hidden blade could be a cursed object that Naruto initially doesn't realize. As he starts using it, strange things begin to happen. He might start having visions or losing control of his chakra at times. However, with the help of his friends like Sasuke and Sakura, he tries to figure out the origin of the blade and how to break the curse. They might research in old ninja scrolls or consult with wise elders in the village to find a solution.
One interesting storyline could be about a new character who discovers a hidden blade technique that was lost in the Naruto world. This character then has to navigate through various challenges and rivalries while trying to master the technique.
One interesting storyline could be a fanfiction where Naruto discovers a long - lost jutsu that was created by the first Hokage. This jutsu gives him new powers and he has to learn to control it while facing off against a new and powerful enemy.
One interesting storyline could be about Naruto characters being transported into the Mount and Blade world and having to adapt to its combat and political systems. For example, Naruto might use his shadow clone jutsu in battles against the bandits in the Mount and Blade setting.
In some fanfictions, there are storylines focused on the relationships in the Hidden Mist Village. For instance, a story could revolve around two childhood friends who grow apart due to the village's harsh training regime. Then, as they get older, they are forced to work together on a mission and have to re - build their friendship while also dealing with external threats.
There could also be a storyline where the Executioner's Blade has a curse. The wielder starts to be influenced by dark thoughts and desires. As the character battles against this curse, they also have to deal with the external threats from other ninjas who see the change in them and believe they are a danger. This could lead to a complex story of redemption and self - discovery.
One interesting storyline could be about Naruto and his siblings training together secretly. They might discover new jutsus that are unique to their family line. This would not only strengthen their bond but also make them a formidable force in the ninja world.
Perhaps in this fanfiction, the hidden blades are not just normal weapons. They could be imbued with some sort of special chakra or magic. This would make them more powerful and give Naruto an edge in battles against stronger opponents like Pain or Madara.
It could be a rogue ninja who was once part of the same clan that the hidden blade belongs to. He wants the blade back to gain ultimate power and is willing to do anything to get it from Naruto.
One interesting storyline could be the twin having a unique ninja ability that Naruto doesn't have. For example, the twin might be able to control water in a way that no one else in the village can. This could lead to them being trained by a different master, perhaps someone who specializes in water jutsu. Another storyline could be the twin getting involved in a different prophecy than Naruto. Instead of being the one to save the village from a certain threat like Naruto, the twin could be fated to deal with an internal conflict within the ninja clans. And finally, the twin could have a different relationship with Sasuke. Maybe they are friends from the start and their friendship has an impact on how Naruto and Sasuke's relationship develops over time.
Another storyline might involve Naruto's family expanding. They could adopt orphans from the war-torn areas of the ninja world. This would show their big - heartedness and also bring new dynamics to the family as they integrate these new members.