In the 'naruto is slowly dying fanfiction', the story may progress as Naruto reflects on his life. He might start to train his friends and students more intensively so that they can carry on without him. Meanwhile, the villains might sense his weakness and start making bolder moves, which would force Naruto and his allies to come up with new strategies despite his deteriorating condition. This would create a lot of tension and drama as the fate of the ninja world hangs in the balance.
Well, it might start with Naruto feeling weak and tired more often. His friends would notice his decline but he would try to hide it at first. As the story goes on, he would start losing his ability to perform jutsus as effectively.
One possible reason could be a powerful curse placed on him. Maybe an enemy with dark magic managed to put a slow - acting curse that is gradually sapping his life force.
The story in this fanfiction might progress as Naruto discovers new things about Tobi's past while he is sealed. This could lead to revelations about the overall plot of the Naruto world. As Naruto delves deeper into Tobi's secrets, he may also face opposition from those who fear the power he now holds with Tobi sealed within him. His relationships with his friends and allies could be tested as they try to decide whether to trust Naruto or not with this new power.
Sakura would be devastated. She'd immediately use all her medical knowledge to try to find a cure. She might also be angry at herself for not noticing earlier. Kakashi would be very solemn. He'd use all his experience and connections to look for a solution. Shikamaru would start formulating plans to find the cause of Naruto's condition. He'd also try to keep the other friends calm while they search for answers.
It can have a big impact. Some fans might be really sad because Naruto is such a beloved character. It can also inspire new fanarts and discussions within the fandom.
In many fanfictions, Naruto's senjutsu training often involves facing various challenges. He might start with basic chakra control exercises to better connect with nature energy. For example, he could be sent to a secluded area like the toad mountain to learn from the toads. There, he has to overcome distractions and his own inner doubts. His training might also include sparring with other powerful characters who have mastered senjutsu to test his skills and learn new techniques.
The story could progress in many ways. It might lead to a chase scene if there are enemies around. His friends might have to quickly come to his rescue. Or the story could shift focus to how Naruto has to explain his true identity and his reasons for using the henge in the first place.
Well, at first, people around him would be very confused and try to reach out. But Naruto would just push them away. Then, his former friends might start to get frustrated with his coldness. Some might even turn against him thinking he has changed for the worse.
The story might progress with his friends and family trying to come to terms with his 'death'. Some might go into seclusion, like Hinata maybe. Others could start investigations to find out what really happened.
Well, in some versions, it might start with Team 7 being shocked at first. They may initially doubt Naruto's ability to be in ANBU because they still see him as the goofy Naruto they've always known. But as they see him in action, they start to respect his new role more. Maybe Naruto has to keep some secrets from them initially which causes some tension within the team, but eventually, they come to accept and support his position in ANBU.
The story could progress with his sister seeking revenge if Naruto was killed maliciously.