One possibility could be a 'Lightning - Fire' hybrid element. Naruto might discover it during an intense battle where he tries to combine his Rasengan (which has a spinning, chakra - based nature) with both his Lightning Style and Fire Style techniques. He realizes that by carefully mixing the raw power of Lightning and the intense heat of Fire, he can create a new element that has the ability to cut through almost anything like Lightning, but also has the burning power of Fire.
Perhaps it's through a special encounter. He could meet an ancient being or a powerful sage who reveals the existence of this new element to him. The being might see Naruto's potential and decide to guide him in unlocking this new power. This would also introduce new characters and lore to the fanfic.
Maybe it's a time - based element. Naruto could use this new element to manipulate time in a limited way. For example, he could slow down time for his opponents during a fight, giving him an edge. This would add a whole new dimension to his combat abilities.
He might also draw inspiration from his friends' jutsus. Sasuke has some powerful fire - based jutsus. Naruto could think about how to counter or incorporate those elements. He could try to merge his own wind - style with Sasuke's fire to create a new type of jutsu that has both the intensity of fire and the cutting power of wind.
The village could be centered around a new philosophy. Since Naruto has always believed in friendship and the power of bonds, the new village might prioritize cooperation over competition. There would be no hierarchy based on bloodlines, but on individual merit and contribution to the village. The architecture of the village might be a blend of modern and traditional ninja styles, with tall towers for lookout and underground bunkers for emergency. It would also have a large library where all ninja knowledge, including the history of every village, is stored and available for study.
The first inhabitants could be some of the outcasts from other villages. Naruto has always had a soft spot for those who are rejected or misunderstood. He might gather those who were bullied in their own villages, like the jinchuriki from other places or those with unique and not - fully - understood abilities. By bringing them together, he would create a diverse and inclusive community in the new village.
Well, it could have the ability to manipulate time on a small scale. For example, the user could slow down time for a brief moment in battle, giving them an edge to dodge attacks or land precise strikes. This would be a really cool and unique ability compared to the existing bloodlines in the Naruto universe.
He could create a jutsu that allows him to teleport short distances. Given his quick thinking and need for mobility in battles, a short - range teleportation jutsu would be very useful. It could be like a mini - version of Kamui but powered by his own chakra.
Perhaps they are ancient water spirits. These spirits could have the power to manipulate water in ways that normal ninjutsu can't. They could turn water into solid ice sculptures that can be used as shields or weapons. They might also be able to swim through the ground as if it was water, allowing Naruto to surprise his enemies from below.
Well, Naruto could start by gathering like - minded shinobi. He's got a lot of friends and allies. Maybe he'd find those who share his ideals about peace and unity. Then, he could start training them in his own unique ninja techniques, which could form the basis of the clan's fighting style.