Mouth clamp would be a mid level spell (maybe level 5) that requires a reflex save and results in the mouth being covered by a magical gag-which can only be removed with a greater dispel magic. The duration would be one hour per caster level. It’s designed to take out spell casters (clerics and wizards)-who generally have poor reflex saves and rely on being able to speak to cast. Bao ignores the effects because she adheres to the Warner Bros Animaniacs school of physics/game rules ;p

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