A 'Solar - Flare Rasengan'. Naruto could combine his wind - style chakra with some kind of solar - based energy he discovers. This jutsu would be like a super - charged Rasengan that emits a blinding light as well as powerful wind - based damage.
There could be a jutsu that allows for instant teleportation across long distances. This jutsu might be a new discovery in the fanfiction world, perhaps created by a character who has been experimenting with space - time ninjutsu. They might use it to quickly get in and out of battles or reach far - off places in a blink.
It could be a new form of Rasengan. Maybe Naruto discovers a way to combine different elements with the Rasengan more effectively, like adding lightning to it for a more powerful and faster attack.
The Bone Sage was a Nascent Soul cultivator of the demonic path in the ❮ Mortal Cultivation Biography ❯. He had once taken in two disciples, Extreme Darkness and Extreme Brilliance, but they had plotted against him and sealed him in the cave abode of an ancient cultivator. Later on, he cooperated with Han Li and repeatedly attacked Han Li. In the end, the Bone Sage was killed by Han Li. The Bone Sage was only at the late Core Formation realm. His ending had something to do with the fact that he had been burned to death by the uncontrollable Shura Sacred Fire.
While waiting for the TV series, he could also click on the link below to read the classic original work of " The Legend of Mortal Cultivation "!
There's also the 'Inferno Storm Jutsu' in some fanfictions. It creates a large - scale storm made entirely of fire. The fire in this storm has different intensities, with the center being the hottest and most destructive. It can cover a large area, making it a great offensive move against groups of enemies.
Maybe Sasuke. Although they are rivals, they also have a deep bond. Sasuke might have come across a unique jutsu during his travels and decide to teach it to Naruto so that they can both become stronger and better protect their village.
It could be Naruto himself who discovers and uses the Katon Hijingakure no Jutsu in the fanfiction. Since he's always exploring new jutsus and pushing his limits.
He might learn a time - traveling jutsu. This would be really cool as it could allow him to go back and change certain events in the Naruto world, or gain knowledge from the past to use in the present battles.
My answer may not be completely accurate because I don't know which literary work you are referring to. If you can provide more context, I will try my best to provide you with a more accurate answer.
My answer didn't involve the specific content of the novel you mentioned. If you can provide more information or context, I will try my best to provide you with a more accurate answer.