Thundering Drums

As you slammed your palms together, a thundering sound blast forth from your palms. Each creature in a 20-foot cone must make a Constitution saving throw. A creature takes 5d8 thunder damage on a failed save and is knocked prone, or half as much damage on a successful one and not prone.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d8 for each slot level above 3rd.