Who invented Ninjutsu in Spiral Pills?

Spiral pill [らせんがんんんんんんんんんんんんんんんん] Its principle is to concentrate chakra on the hand, forming a high-speed rotating high-density "chakra ball". The performer can add attribute changes, for example, Naruto adds wind attribute to form "wind spiral shuriken". Four generations referred to the principle of Kyubi no Youko chakra gun when developing this technology. In fact, bijuu Naruto mixed Kyubi no Youko Yin Yang and chakra in a ratio of 8: 2 to make a spiral pill, which is the "chakra Gun". In a sense, this chakra gun is the highest stage of spiral pills, and it is also the original intention of the four generations to develop this technology. The performer does not need to seal, and then uses one hand, two hands or three hands (there is no essential difference, but the performer's ability to control chakra is different. In the fourth generation, Kakashi and Jiraiya can be issued with one hand, and their naruto ability is weak, so they need the help of "others", that is, the shadow avatar; It seems that the more hands you use, the easier it is to gather in chakra. Five hands (wind shield spiral shuriken, inspired by Kakashi, used two avatars, one gathered in chakra and the other injected chakra with the nature of "wind" into spiral pills) to release chakra, master and solidify it. Beginners must use two hands, one hand is ready to condense the chakra ball, and the other hand is ready to condense. Release chakras with both hands at the same time until a chakra ball is formed. After that, if chakra can further control it, he can release chakra with one hand, control it well, and practice this trick in three stages. In the first stage, chakras are released in a part of the body, such as feet, hands, etc. Kakashi taught Naruto them, and they learned it smoothly. In the second stage, a certain amount of chakras are released continuously, and in the first stage, further exercises are carried out. In the third stage, practice the water polo balloon, keep the released chakras and materialize them until the balloon can be broken. At this stage of practice, the spiral pill can already cause damage, but it can only cause light surface damage. In the final stage, put everything in front of you together, put chakra in your hand, release and maintain it constantly, and finally solidify into a powerful typhoon, which can not only cause greater surface damage, but also penetrate into the enemy's body and destroy the enemy's interior, so even a resilient pocket can't afford to fall on the ground after this move, but the spiral pill has one disadvantage, that is, it can only attack in a straight line. Difficulty: A Practicality: ★★★★☆ (Less natural changes than a thousand birds)