Chi Strike

From LSWiki

    Perform Chi Strike

    General-Use Combat Maneuver
    Usage: perform chi strike [at <target>]
    Requirement to Use: have at least 500 points among 100% of martial arts skill, 100% of
        philosophy skill, 100% of pneumaturgy skill, 100% of evocation skill, 100% of
        bellerophrasty skill, 50% of discipline skill, and 50% of unarmed combat skill and be
        familiar with chi strike
    Typical Activity Cost: 20

    Focusing your chi into a weapon, you strike with your hand in a fashion that destroys the
target's spiritual body as well as the physical.

Learned by first meeting the requirement to use, and then asking to be taught by Musashi as an Aisenshi or by Rindol after completing his relevant task.