This spell allows the shukenja to force any shapechanger to reveal its true form (the form most commonly used). The shukenja simply points at those known or believed to be shapechangers. These creatures, if they are shapechangers, must make a successful saving throw vs. spell or immediately revert to their true forms. In addition, the change is accompanied by wracking pain, causing 3d10 points of damage to the shapechanger. The shapechange takes an entire round, during which the creature can take no other action. If the saving throw is successful, the shapechanger does not change form. However, the strain of resisting the spell causes pain equal to half the normal amount.
The material component for this spell is a live butterfly, released when the spell is uttered.'
Notes: Common for priests from an oriental setting: otherwise, very rare.