Steam Whistle

8th-level evocation (clockwork)

Casting Time: 1 action
Range: Self (30-foot radius)
Components: V, S, M (a small brass whistle)
Duration: Instantaneous

You open your mouth and unleash a shattering scream.

All other creatures in a 30-foot radius around you take 10d10 thunder damage and are deafened for 1d8 hours. A successful Constitution saving throw halves the damage and reduces the deafness to 1 round.