In a fanfiction, Naruto could inherit the Rinne Sharingan from a long - lost relative. This would completely change his abilities and fighting style. He could start to use the powers of the Rinnegan, like the Six Paths techniques, in combination with his own Uzumaki and Jinchuriki powers. This would make him an even more formidable opponent, and he could use these new powers to protect the Hidden Leaf Village from threats that were previously unbeatable.
One plot idea could be that Naruto discovers an ancient scroll that reveals a way to obtain the Rinne Sharingan. This new power then causes a rift in the ninja world as some fear his newfound strength while others see it as a way to finally achieve peace. He has to struggle with mastering this power while also dealing with the political implications.
Maybe Naruto gets the Rinne Sharingan during a battle with an extremely powerful and unknown enemy. The power suddenly awakens within him, and it gives him the ability to see the enemy's moves before they happen more clearly. With this, he can turn the tide of the battle. However, he soon realizes that the Rinne Sharingan has a dark side that he needs to control to avoid being consumed by it.
If you want the clearest chapter reference, go to Chapter 120. Early on, Facing the sudden and somewhat strange request from Jiang Li, Director Sun...; later, the chapter leans on But, as if by some mysterious force, he still instructed his assistant to....
If you want the clearest chapter reference, go to Chapter 158. Early on, Reluctantly, Jiang Yan had no choice but to forcibly join the group for...; later, the chapter leans on A few people lined up and jogged down the narrow path, looking strikingly....
A practical answer is Chapter 136, because it turns the idea into a concrete scene. The chapter opens with A few people retraced their steps back to the place they had just been., adds pressure through For those who have not found peace in death, isn't this talisman the best..., and ends on Aunt.
Chapter 129 is the strongest chapter-level answer because it starts from When they saw that the live chat was full of praise for Jiang Li, those... and follows through on With that thought, he smugly turned on his phone..
Look to Chapter 185 for the clearest answer. It begins with He was so anxious that he immediately picked up the megaphone., keeps building through Villagers over there, how did we train you before?, and lands on The next, she'd complain that the ground was too slippery to walk on..
A practical answer is Chapter 140, because it turns the idea into a concrete scene. The chapter opens with In the evening, the setting sun was like blood, dyeing the entire earth a..., adds pressure through The Master should come to our place, she helped predict my child's future..., and ends on I.
Look to Chapter 160 for the clearest answer. It begins with As the sky gradually darkened, the originally mild drizzle began to..., keeps building through Jiang Li looked up at the sky and turned to the people behind him and..., and lands on Then came Shu Yan and Jiang Li, while He Yun silently.
A practical answer is Chapter 140, because it turns the idea into a concrete scene. The chapter opens with In the evening, the setting sun was like blood, dyeing the entire earth a..., adds pressure through The Master should come to our place, she helped predict my child's future..., and ends on I.
The best chapter pointer here is Chapter 132, "Looking at me with that kind of eyes, are you afraid I'll eat you?". It opens with The new girl in the live-streaming room went crazy. and closes on He stir-fried the other dishes Jiang Li had prepared, and somehow managed....
The best chapter pointer here is Chapter 133, "Teacher Du, Please Reconsider the Termination of the Contract". It opens with Watching Jiang Li and the others finish their meal and tidy up the table,... and closes on It was only after she shared the concept and purpose of the show with him....