The scythe's sentience might allow it to have a special connection with Naruto's chakra. It could enhance his chakra - based attacks. For instance, Naruto could channel his chakra through the scythe to create powerful energy slashes. His fighting style would become more versatile as he combines his ninjutsu with the scythe's physical attacks. Also, the scythe could potentially teach Naruto new forms of chakra control that he didn't know before, which would be a huge boost to his overall fighting capabilities.
It would likely add a new dimension of reach. Naruto could use the scythe's long handle to keep opponents at a distance. And since it's sentient, it might be able to anticipate an opponent's moves and guide Naruto's strikes more effectively.
The origin could be some ancient, long - forgotten magic. Maybe it was created by a powerful and now - extinct clan. They might have imbued it with a spirit or some form of intelligence for a specific purpose, like protecting a hidden treasure or an important location.
Well, he might incorporate more acrobatic moves. The scythe is a large and unwieldy weapon compared to his usual ninja tools. So he'd probably have to be more fluid in his motions, using spins and wide arcs to attack. He could also use his ninja skills like chakra control to enhance the power of his scythe strikes, for example, coating the blade with chakra for a stronger cut.
He might start using more sweeping and slashing motions. Instead of his usual close - range punches and kicks, he could use the scythe's long reach to keep his opponents at a distance. For example, he could swing the scythe in wide arcs to fend off multiple enemies at once.
The scythe might make Naruto's combat style more aggressive. He could use it for long - range attacks and quick slashes, adding a new dimension to his fighting. For example, he could combine his shadow clone jutsu with scythe attacks, having clones distract the enemy while he swoops in with the scythe.
He might use a scythe with a chakra - infused blade. This would give it an extra edge (literally) in combat, allowing it to cut through tougher materials. The scythe could also have some sort of sealing mechanism on it, similar to his kunai, so he could store small items or even chakra - based attacks within it for surprise strikes.
A sentient sword can change the Naruto story in many ways. For instance, it can act as a mentor to Naruto. Since it has its own knowledge and experiences, it can guide Naruto in his training and in battles. This gives Naruto an edge over his opponents as he has the wisdom of the sword at his disposal.
His fighting style would likely incorporate more acrobatic moves. Since the Keyblade can be used for things like jumps and dashes in mid - air, Naruto would start using these abilities. He might also use the Keyblade to block attacks more effectively than he could with just his kunai or shuriken. And he could use the Keyblade's power to enhance his speed, allowing him to quickly close the distance between him and his opponents or dodge attacks more easily.
Naruto could combine his Shadow Clone Jutsu with Stormbreaker. He could create clones to surround his enemies and then use Stormbreaker to launch a powerful attack from the center. This would be a new and unexpected tactic for his opponents. Also, he might use his chakra to enhance the power of Stormbreaker even further, like making it shoot out energy blasts.
Perhaps it was a weapon created by a rogue ninja with unique powers. And for some reason, it found its way to Naruto in Wave. It might also be a weapon that was enchanted by a sorcerer long ago and has special abilities that Naruto will discover as he uses it.
One potential character could be Sasuke. Imagine in a dark, alternate universe fanfic where Sasuke, instead of using his sword, wields a scythe. It could be a symbol of his more menacing and reclusive nature. He might use it with his Sharingan abilities, making his strikes not only powerful but also unpredictable as he can anticipate his opponents' moves.