Ultimate Adventurer's Handbook
Aura of Silence
6-level Illusion
Casting Time: 1 action
Range/Area: Self
Components: V, S
Duration: Concentration, up to 10 minutes
You envelope yourself in an aura of deafening silence. For the duration, this aura of silence extends 20 feet from you. Creatures inside this aura are immune to thunder damage, are deafened, and can’t cast spells with verbal components. You can choose to end or resume any of these effects on yourself or any other creature within the aura at any time (no action required).