Thundering Drums

You strike the ground in front of you, filling the area in front of you with the thunder of pounding drums. Each creature in the area must make a Constitution saving throw, taking 5d8 thunder damage on a failure, or half as much damage on a success. A creature that fails its saving throw is also knocked 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.