Thunder Breathing: Thunderclap and Flash

You take a low stance as you concentrate on your breathing. With a clap of thunder, you disappear from your current location and reappear in a space you can see within range. Though it appears you are teleporting, you are instead attacking and running at the speed of sound, causing opportunity attacks against you to fail. Each creature you choose in the line between the two spaces must make a Dexterity saving throw. On a failed save, a creature takes 2d8 thunder damage and 1d8 slashing damage, or half as much damage on a successful one.

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