Belrah's Bussy Blast

You snap your fingers in a direction and a wave of sound is sent forward. Each creature in a 30-foot cone originating from you must make a Strength saving throw. On a failed save, a creature takes 6d8 thunder damage, is pushed 10 feet away from you, and is vulnerable to Thunder damage until the start of your next turn. On a successful save, the creature takes half as much damage and isn't pushed.

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.