For the duration, no sound can be created within or pass through a 20-foot-radius sphere centered on a point you choose within range. Any creature or object entirely inside the sphere is immune to thunder damage, and creatures are deafened while entirely inside it. Casting a spell that includes a verbal component is impossible there.
Gestures & Ritual
Verbal, Somatic, Ritual
Bard, Cleric, Ranger
Concentration, up to 10 minutes
Effect Casting Time