Sure, there are jutsus aplenty in the Naruto manga. They range from elemental jutsus like Fire Release and Water Release to powerful sealing techniques. These jutsus play a crucial role in shaping the battles and character development within the manga.
In Naruto fanfiction, forbidden jutsus often include things like the Edo Tensei in a more extreme or modified form. However, it's important to note that adult fanfiction may contain inappropriate or non - canon elements that deviate from the original Naruto story. So, it's better to focus on the official Naruto lore for a more accurate understanding of jutsus.
A really interesting secret jutsu in Naruto fanfic could be the 'Energy Absorption Jutsu'. This jutsu enables the user to absorb any form of energy, whether it's chakra - based attacks or natural energy from the surroundings. It gives the user a huge advantage in battle as they can then use the absorbed energy to power up their own attacks. There might also be a 'Teleportation Gate Jutsu' which creates multiple gates in different locations that the user can instantly teleport between. And the 'Aura Manipulation Jutsu' where the user can manipulate their own chakra aura to have different effects, like creating a shield or enhancing their physical abilities.
One possible plot could be that Naruto becomes an all - powerful ninja who uses his knowledge of all jutsus to bring peace to the ninja world. He could travel from village to village, teaching the jutsus to others and uniting the different ninja clans.
Sasuke could be one of the people to teach Naruto new jutsus. They have a friendly rivalry and Sasuke has some unique jutsus like his Rinnegan - related abilities. He could teach Naruto some aspects of the Rinnegan's power, or at least how to counter it more effectively which could be considered a new 'jutsu' in a sense.
His old friends from Team 7 like Sakura would also be his allies. Sakura, with her medical ninjutsu skills, could support Naruto when he uses his vast array of jutsus in battles. They could work together in missions, with Naruto providing the offensive and defensive jutsu power and Sakura taking care of any injuries.
One possible new jutsu could be the 'Force - Nature Manipulation'. Naruto loves nature and is already good at using nature - based chakra. With the force, he could go beyond just using chakra from nature. He could use the force to actually control natural elements like waterfalls, trees, and rocks directly. For example, he could make a whole forest move to his will, trapping his enemies or creating barriers. This would be a very unique and powerful jutsu that combines his ninja skills with the power of the force.
Well, he might start with intense training sessions. Maybe he observes Kakashi closely for the Chidori, and for the Rasengan, he practices over and over again, gradually getting the hang of the chakra control required.