One common theme is redemption. Characters with bloodlines often go back in time to correct past mistakes or redeem their family's name. Another theme is power exploration. They use their time - traveling opportunity to fully understand and master their bloodline abilities which they may not have been able to do in their original time.
I've heard of 'Time - Traveling with Naruto Bloodline'. It's a fanfiction that dives deep into the concept of time travel and Naruto bloodlines. The main character's bloodline gives them certain advantages and disadvantages as they journey back in time. They have to navigate the complex politics and power struggles of the Naruto world in the past while also coming to terms with their own bloodline abilities. It has a great mix of action, mystery, and character development.
In Naruto space - time bloodline fanfiction, the bloodline abilities related to space - time are often enhanced or modified. Some fanfictions might introduce a new clan with a unique space - time bloodline. This new bloodline could have abilities like instant teleportation across long distances or the ability to create pocket dimensions. It gives the writers a chance to expand on the existing Naruto universe's concepts and create their own unique storylines.
Then there's 'Chrono - Bloodline Rebellion'. It's about a group of ninja who have a special space - time bloodline and they rebel against the traditional ninja hierarchy. The fanfiction is popular because it not only has cool space - time power showcases but also has a strong underlying message about freedom and the fight against oppression in the ninja world.
One interesting concept could be time - traveling bloodlines. For example, a character might have a bloodline that allows them to travel through time and change key events in the Naruto universe. This could lead to alternate storylines and character developments.
There are also fanfictions where a bloodline is created through some sort of experimental jutsu. For example, a bloodline that allows the user to transform into different elements at will. This would give the character an edge in combat as they could adapt to any situation by changing their form.
Well, when it comes to Naruto time travel and Rinnegan in fanfics, it's often about exploring new storylines. Maybe Naruto himself gets the Rinnegan and travels back in time to train his younger self. This would make him a much more powerful ninja at an earlier stage and could completely change the power balance in the Hidden Leaf Village and among the other ninja villages as well.
The knight bloodline could be integrated as a foreign power that was brought to the Naruto world long ago. Maybe a group of warriors from another dimension with the knight bloodline came and settled, and over time their bloodline got diluted but still resurfaces in certain individuals.
He might use some special jutsu or seals. For example, he could use a sealing technique to suppress the signs of his bloodline. This way, others wouldn't be able to detect it through normal means like sensing chakra.
It could also be part of a strategic move. By hiding his bloodline, he can surprise his opponents in battle. They would underestimate him based on not knowing about his true powers, and then he could turn the tables on them when the time is right. This gives him an edge in combat situations.