Thunderpulse

You gather sonic energy and can expel it in shockwaves for the duration. Until the spell ends, the you can use an action emit a shockwave in a 15-foot cone. Each creature in that area must make a Constitution saving throw, taking 3d8 thunder damage and being knocked 10 feet away from you on a failed save, or half as much damage and not being knocked away on a successful one.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d8 for each slot level above 2nd.

Source: Kibble's Generic Elemental Spells