The List

Ryo returned to his dorm room after a short practice using the Kunai, soaking in the warm water to relieve fatigue. After putting on his clothes he took out an ancient book that he got from the secret library. Sword King's Wisdom.

 He is looking for an inspiration for a new skill that can be used in combat. A skill that he could use at mid range combat. Throwing weapons like Kunai might be useful to distract the enemy or just a small target.

 He turned to the next page, then he found the advanced technique of Iai called [Purgatory Slash].

Legend has it, that technique was used by strongest swordmens that live on the other side of universe to slashed down a Demon God. Unlike Iai's basic technique form which shoots the body towards the target. This advanced technique focuses more energy on the sword and then shoots it at the target.