Draconic Roar

A loud roar, painfully intense and resembling a dragon's roar, erupts from your open mouth. Each creature in a 30-foot cone must make a Constitution saving throw. A creature takes 5d8 thunder damage on a failed save, or half as much damage on a successful one.

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.