Ninjutsu According to the search, Spiral Pill is a powerful endurance skill commonly used by Uzumaki, the protagonist of the Japanese anime Naruto. Inspired by Bijyudama, Huo Ying's fourth generation Namikaze Minato spent three years developing it, and his son Naruto Usagi even carried it forward. Like Bijyudama's principle, it is to concentrate chakra on the hand, condense the huge tearing force generated by high-speed rotation in a small range to destroy the enemy, and form the skill of attacking the opponent with a palm-sized chakra ball.