They are exactly what you need to destroy in order to free the regiment! As I had told you earlier, Kirith had a plan.$B$BEach of the servants does have a weakness. Punish their physical form in proximity of their stones until they are near the state of disintegration. It is at that point, and that point alone, that the stones of binding are vulnerable to attack. You must hurry to destroy the stones, however, as once the enslaved regain their composure, they will be invulnerable to harm once more.