Well, one interesting concept could be the unique ways the forbidden jutsu are reinvented. For example, some fanfics might explore how a forbidden jutsu could be modified to have different effects or be used in unexpected situations. Maybe a forbidden jutsu that was originally for destruction is tweaked to be a form of protection in a fanfic.
It could be a jutsu that manipulates life and death. Naruto has always been about protecting life, but this jutsu might give him the power to bring the dead back to life. However, this would go against the natural order of things in the Naruto universe.
Well, he could become extremely powerful. Maybe he'd use the forbidden jutsu to defeat powerful enemies like Madara or Kaguya in a really unexpected way. For example, if it was a time - travel related jutsu, he could go back in time and stop certain events from happening that led to the rise of these villains in the first place.
Some fanfictions might explore the idea of combining Forbidden Jutsus. Picture a scenario where a rogue ninja combines a Forbidden Jutsu of destruction with a Forbidden Jutsu of mind control. This could create a super - powerful and extremely dangerous new ability, and the story could follow the efforts of the main characters to stop this new threat.
Naruto is often involved. Since he is the main character of the original series, it's natural that in fanfiction about Forbidden Jutsu, he would be curious or accidentally get involved with these powerful techniques. Sasuke is another common character. His thirst for power could lead him to seek out Forbidden Jutsus.
Some fanfics might also feature Kakashi. He has knowledge of many jutsu and a past that is filled with secrets. So, he could be the one who either discovers a new aspect of a forbidden jutsu or is trying to prevent others from misusing it.
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.
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.
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 are three main types of jutsu: Ninjutsu, Genjutsu, and Taijutsu. Ninjutsu involves using chakra to perform various techniques like fire - based jutsus or water - based jutsus. Genjutsu is about creating illusions to deceive opponents. Taijutsu is more about physical combat skills and martial arts - like movements.