Your voice trills in perfect vibrato. When casting the spell, you can make the area any radius you choose, up to 40 feet. The reverberations of your voice continue to shimmer and hang in the air as long as you Sustain the spell but can't be heard at all outside of the area. A creature must attempt a Will save if it's within the area when you Cast the Spell or as soon as it enters the area while the spell is in effect. Once a creature has attempted the save, it uses the same result for that casting of vibrant vibrato.
Critical Success The creature is unaffected.
Success The creature takes 5d10 persistent sonic damage at the end of their turn as long as they remain within the aura's area of effect.
Failure As success, but if the creature leaves the area, or if you move far enough from the creature that they're no longer in the area, the creature hears a shattering sound and takes 5d10 sonic damage and is Stunned 1. The creature is then Deafened for the rest of the spell's duration.
Critical Failure As failure, but the creature takes double the sonic damage and is Stunned 3.
Heightened (+1) The damage on a failed save increases by 1d10.
Traits
Auditory actions and effects rely on sound. An action with the auditory trait can be successfully performed only if the creature using the action can speak or otherwise produce the required sounds. A spell or effect with the auditory trait has its effect only if the target can hear it. This applies only to sound-based parts of the effect, as determined by the GM. This is different from a sonic effect, which still affects targets who can't hear it (such as deaf targets) as long as the effect itself makes sound.
An aura is an emanation that continually ebbs out from you, affecting creatures within a certain radius. Aura can also refer to the magical signature of an item.
An action with this trait requires a degree of mental concentration and discipline.
You must physically manipulate an item or make gestures to use an action with this trait. Creatures without a suitable appendage can't perform actions with this trait. Manipulate actions often trigger reactions.
An effect with the sonic trait functions only if it makes sound, meaning it has no effect in an area of silence or in a vacuum. This is different from an auditory spell, which is effective only if the target can hear it. A sonic effect might deal sonic damage.