Concussive Blade

Swirling elemental energy wreathes a melee weapon you touch. On a successful hit with the weapon, the target takes an additional 1d6 thunder damage and must make a Constitution saving throw or become deafened for 1 round. The spell ends if you cast it again or if you let go of the weapon.

The damage increases as you increase in level: 2d6 at 5th level, at 3d6 11th level, and 4d6 at 17th level.