- Name: Hidden Sword Technique: Otogoe no Tenchi Gaeshi (Hidden Sword Technique- Supersonic Heaven and Earth Reversal)
- Martial Art Style: Kenjutsu (Iaido)
- User: Kagero Sai
- First Use: Battle 565
An extremely powerful Iaido technique that's preformed with a gardening hoe. Using his newfound power of "Iai against the Earth" to it's fullest extent, Sai slices up the ground around him in a spiral formation with great speed, destroying everything within the path of his attack in the process. The range of this technique is massive, as Sai was able to completely plow up most of the arrows surrounding the battlefield with this technique.