In such a fanfiction, Naruto might experience extreme loneliness. He would watch his friends and loved ones die while he remains alive. He could also be hunted or studied because of his immortality, constantly on the run from those who want to use his unique condition for their own gains.
His character could develop in a very complex way. At first, he'd probably be confused and scared about the curse. But as time passes, he might use his immortality for good in a more extreme way. For example, he could take on the most dangerous missions without fear of death. However, the constant cycle of seeing people he loves die would also harden him. He might become more calculating and less impulsive, as he realizes the long - term consequences of his actions. He could also gain a deeper understanding of life and death, and maybe try to find a way to break the curse not just for himself, but for others who might be suffering from similar fates.
Maybe Percy tries to break the curse. He could embark on a quest to find a powerful magical artifact or a long - forgotten spell that has the power to reverse his immortality. Along the way, he would face various challenges and meet interesting characters who either help or hinder his journey.
The origin of the cursed sword could be from an ancient and evil clan. Maybe they used dark magic to create it, and it was lost over time until Naruto discovers it by chance. For example, it could have been buried in a forgotten tomb that Naruto stumbles upon during a mission.
The cursed sword could enhance Naruto's physical strength. Since Naruto already has a lot of raw power, the sword might multiply it, making his punches and kicks even more powerful. For example, if he punches an enemy while holding the sword, it could send the enemy flying farther than normal.
Percy would probably develop a greater sense of patience. Since he has all the time in the world, he could learn to wait for the right moment to act. This new - found patience could help him in his adventures and in his attempts to either break the curse or come to terms with his immortality. He might also study various things over the long years, becoming more knowledgeable and wise, which would also shape his character.
You can try some well - known fanfiction websites like FanFiction.net or Archive of Our Own (AO3). They have a large collection of Naruto - related fanfictions, and you might be able to find 'naruto cursed fanfiction' by using their search functions. Just type in relevant keywords like 'Naruto' and 'cursed' and browse through the results.
Well, in some 'naruto cursed fanfiction', there are stories that focus on the curse marks in a different way. Like, they might expand on how the curse marks could have affected the characters' mental states more severely. Some might also create new curses that are specific to certain clans that were not in the original story. These types of fanfictions can be quite interesting as they add a new layer of mystery and darkness to the Naruto universe.
Another theme could be related to the origin of the curse. It might be something passed down through generations in the Uzumaki clan, or perhaps a result of some forbidden jutsu. This could lead to Naruto having to uncover the mystery behind the curse to break it.
Jiraiya is another character that could be present. As Naruto's mentor, he would be concerned about Naruto getting the cursed seal. He might try to find a way to remove it or at least teach Naruto how to manage it without losing himself. Jiraiya's vast knowledge of ninja arts could play a crucial role in Naruto's struggle with the cursed seal.