Concussive Voice

You amplify your voice to a degree loud enough to cause physical damage. For the duration:

• When you speak, you can make your voice audible and perfectly intelligible at long distances. The distance varies depending on the location and background noise, as determined by the DM, from 1 mile in heated combat up to 5 miles in complete silence.
• As an action, you can focus your voice into a damaging shockwave. Each creature in a 30-foot cone must make a Constitution saving throw. On a failed save, a creature takes 4d10 thunder damage and is deafened until the end of your next turn. On a successful save, a creature takes half as much damage and is not deafened.

Using a Higher-Level Spell Slot. The damage increases by 1d10 for each spell slot level above 4.