Training to level 2. It has a knock back effect with a 3 tile radius around the user, canceling techniques of anyone hit by it. Like other Gentle Fist techniques, its damage scales off of Strength.
You need to be at least level 30 with Taijutsu Mastery and have leveled up Water Needle Training to level 2.
How To Obtain
This works a little different as it's a completely separate technique you acquire once you reach a level with another technique, that being Water Needle Training.