Well, in some fanfictions, 'naruto blood needles' might be a unique jutsu created by the author. It could have special properties like being able to pierce through powerful defenses or having some sort of tracking ability. Maybe it's a technique Naruto develops after a really intense training session or a life - threatening encounter.
There are fanfictions where the 'naruto blood needles' are used more strategically. Naruto might use them to set up traps. He could leave a trail of his blood in a certain area and then, when the enemy steps into that area, he activates the needles to rise up from the ground or shoot out from hidden spots. This way, he can catch the enemy off - guard.
In fanfiction, the Naruto Blood Needles Jutsu may be a very creative and interesting concept. It may be inspired by the various elemental and unique jutsus in the Naruto series. The idea of using blood to form needles could imply a deep connection between the user's life force and the jutsu itself. For example, a character with a strong will and a large amount of chakra might be able to create more powerful and numerous blood needles. Also, the jutsu could have different levels of mastery, with more advanced users being able to control the shape, speed, and trajectory of the needles with great precision. It could also be a jutsu that is passed down within a certain family or group, with specific training methods and secrets associated with it.
The power of the Naruto Blood Needles Jutsu in fanfiction really depends on how it's written. If the author decides that the jutsu can pierce through any defense, then it would be very powerful. It could also be made more powerful if the user can sacrifice more blood to create larger or more numerous needles. However, it might also have limitations such as the amount of blood the user can afford to lose, which would balance out its power.
Needle Punishment was a type of punishment, in which silver needles were used to cause harm to people. The book, Needle Punishment, described in detail how to use silver needles to carry out this punishment, including how to cause the greatest damage without leaving a scar. There were many types of silver needles. Usually, they had a diameter of 0.25 mm, 0.30 mm, and 0.35 mm. The 0.25mm thin needle was suitable for children, women, and the elderly who needed delicate treatment. The 0.30mm medium needle was suitable for ordinary adults, and the 0.35mm thick needle was suitable for people with thick muscles and strong physique. In addition, the length of the silver needle was also different, including 25 mm, 30 mm, 40 mm, 50 mm, 75 mm or longer. Different lengths were suitable for different acupuncture parts and treatment targets. The silver needles used in acupuncture were mainly because silver ions had a certain degree of sterilization. Moreover, the properties of the silver needles were stable, so they were not easy to rust and were easier to preserve.
Yes, there might be. The Naruto fandom is vast, and there could be fanfics exploring various themes like Iruka's dislike for needles. You can try searching on fanfic platforms such as Fanfiction.net or Archive of Our Own.
An older, more experienced ninja from a hidden village that specializes in needle - based jutsu could become his mentor. This ninja could have unique insights into the art of using needles, teaching Naruto different formations and strategies for using them in battle.
Physically, he might gain new powers or abilities as mentioned before. But there could also be negative effects. His body could reject the foreign blood, leading to internal pain and weakness.
One idea could be that Naruto discovers a new jutsu that involves using needles as projectiles. He might train hard to master this unique skill and use it to surprise his opponents in battles. For example, he could combine his chakra with the needles to make them more powerful and accurate.
It could be the result of Naruto's own inner demons. Maybe he discovers some dark secret about his past, like his parents being involved in something he can't accept. This self - realization could be so traumatic that it makes him cry blood as he struggles to come to terms with it.