Most Skaven magic corrupts the body; this spell corrupts the mind. When cast, the Seer spreads a web of insanity around him, warping the minds of all within 100 yards. Every humanoid within range must take a WP test or succumb to the spell's influence. Victims degenerate into a mindless horde, instinctively aiding all Skaven and the Seer in particular. They gather around the caster to protect them, follow simple instructions, and attack anyone unaffacted by the magic, using hands and teeth. Victims also lose the power of speech, communicating with gestures and the rat-like chittering noises that give this spell its name. When the spell runs out, is dispelled or the Seer is killed, they return to their normal state over 1D10 turns.