The idea of new alliances and rivalries can also be explored. With the power of the Eternal Rinnegan, other ninja villages may either seek an alliance or become rivals. Fanfiction could delve into the politics and power dynamics between villages, and how the character with the Eternal Rinnegan navigates these complex relationships.
In some 'naruto black rinnegan fanfiction', there might be a new backstory for how the black rinnegan came to be. It could be related to an ancient and long - forgotten clan in the Naruto universe. This would add a whole new layer of mystery and intrigue to the story.
Some fanfictions might focus on the moral implications of having the Rinnegan. Since it's such a powerful dojutsu, characters with it could face different moral dilemmas. For instance, should they use its powers for domination or for the greater good? And how does the possession of the Rinnegan change a character's personality? Does it make them more power - hungry or more altruistic? These are all things that can be explored in Rinnegan fanfiction.
One interesting concept could be exploring the reasons behind the abandonment of the Rinnegan in the fanfiction. Maybe it's due to some unforeseen consequences or a character's choice that goes against the typical use of the Rinnegan in the Naruto universe.
One interesting concept could be how Naruto's character changes with the Rinnegan in an evil context. Maybe his views on power and friendship shift drastically. For example, he might use the powers of the Rinnegan to control others instead of protect them.
In some fanfictions, they might explore the emotional and psychological impact on the character who has the eternal mangekyou rinnegan. For example, how does the power change their relationships with other characters? Do they become more isolated because of the great power they hold or do they attract more allies? It could also show how they struggle to control the power and not be consumed by it.
One interesting concept is the combination of powers. In fanfiction, often the Mangekyou Sharingan and Rinnegan abilities are merged in unique ways. For example, a character might be able to use Susanoo with the added space - time manipulation of the Rinnegan. Another concept is the backstories created for how characters obtain these powerful eyes. It could be through some long - lost family heritage or a strange encounter with a powerful entity. Also, the exploration of the psychological effects of having these eyes is fascinating. Characters may struggle with the newfound power and the moral implications that come with it.
One interesting concept could be the exploration of new jutsu combinations. Since the Rinnegan is a very powerful dojutsu, fanfiction might imagine unique ways a character with shared Rinnegan could use its abilities. For example, combining the Rinnegan's power to control gravity with Naruto's shadow clone jutsu in a way that has never been seen before in the original series.
One interesting concept could be the exploration of new sage powers. Maybe the characters in the fanfiction discover unique ways to use sage mode that were not shown in the original Naruto series. For example, they might be able to combine different elements while in sage mode in a more efficient way.
One interesting concept could be new and unique jutsu. For example, the author might create a jutsu that combines the powers of the eternal mangekyo in a way that has never been seen in the original Naruto series. Another concept could be different character relationships. Maybe in the fanfiction, characters who were enemies in the original become allies, all because of the power of the eternal mangekyo.
Perhaps a plot where the character with the eternal rinnegan has to face an extremely powerful enemy that can only be defeated by mastering all the abilities of the eternal rinnegan. This could involve a series of intense battles and strategic planning. For example, they might need to figure out how to combine different rinnegan - related techniques to counter the enemy's attacks.