The plot could involve some sort of time - travel or alternate dimension scenario. Naruto could be sent to a parallel world where the Uchiha clan was never massacred. There, he befriends the Uchiha and learns their ways. Eventually, he earns the right to receive the Eternal Mangekyou Sharingan through his deeds and his strong bond with the clan. With this new power, he has to find a way to return to his own world and use it to protect his friends and village from a new, greater threat.
In the fanfic, Naruto having the Eternal Mangekyou Sharingan could lead to a change in his relationships. His friends might be both in awe and a bit worried about this new power he has. Sasuke, being an Uchiha, could have a complex reaction. Maybe they would train together to better understand and control this power. Naruto could also use it to try and bridge the gap between the Uchiha and the rest of the village even more, as he now has a part of the Uchiha heritage in a very powerful way.
One possible plot could be that Naruto gains the Eternal Mangekyou Sharingan through some sort of unexpected and mysterious event. Maybe it's a result of a powerful jutsu gone wrong that fuses his own chakra system with that of a Sharingan - user. This new power could initially be difficult for Naruto to control, leading to him having to isolate himself to figure it out. As he masters it, he could use it in unique ways, like combining the Sharingan's abilities with his own Rasengan techniques, creating entirely new and powerful attacks.
A plot twist could be that Naruto receives the Mangekyou Sharingan from Sasuke in a self - sacrificing moment. Sasuke, realizing the true potential of Naruto's power combined with the Sharingan, decides to transfer his Mangekyou Sharingan to Naruto. This would create a whole new dynamic in their relationship. Naruto would then have to master the abilities of the Sharingan quickly to face an impending and powerful threat to the Hidden Leaf Village.
Power. The eternal mangekyou sharingan represents a great power in the Naruto world, so many fanfics focus on how characters use or struggle with this power.
The Eternal Mangekyou Sharingan is a very powerful and significant element in Naruto fanfiction. It represents a high - level evolution of the Sharingan. In fanfictions, it often gives the characters who possess it extraordinary abilities, like enhanced visual powers, the ability to use unique and powerful jutsus.
One possible plot twist could be that Naruto gains the Mangekyou Sharingan in a moment of extreme emotional turmoil, like seeing Sasuke in a life - threatening situation. This new power might make him an outcast in Konoha at first, as the Sharingan is a symbol of the Uchiha. Another twist could be that the Mangekyou Sharingan has some unforeseen side effects on Naruto's chakra system, making it difficult for him to control his normal jutsu. It could also lead to a power struggle within the village as some might fear Naruto's new - found power.
Another possibility is an ancient evil that has been awakened by the presence of Naruto's new power. The Eternal Mangekyou Sharingan might emit some sort of energy that disturbs an old seal or something. This ancient evil could be a powerful demon or a long - forgotten ninja with dark powers. It would be a huge threat not only to Naruto but also to the entire ninja world, and Naruto would have to use his new - found power along with his usual determination to stop it.
In Naruto fanfiction, it's often portrayed as extremely powerful. It can give characters abilities like seeing through any illusion, predicting an opponent's moves with near - perfect accuracy.
A possible plot could be that Dark Naruto's Eternal Mangekyou Sharingan has a special power that can merge the minds of people. He uses this to merge with the good Naruto inside him. Through this merge, he battles his inner demons and slowly transforms back to his normal self while also gaining the combined strength of both his dark and light sides.
In such a fanfiction, one possible plot could be that Naruto acquires the Mangekyou Sharingan through some kind of magical or experimental accident. Maybe a powerful enemy uses a jutsu that backfires and transfers the Sharingan to Naruto. Then Naruto has to learn to control its power while also facing the prejudice from those who fear the Sharingan's abilities.