Concussive Blast

You manipulate the forces of gravity centered on a point you can see. A small black dot forms and expands to a 1 foot radius sphere before collapsing in on itself and exploding. Creatures within 20 ft of the point must make constitution saving throws. A target takes 6d6 force damage on a failed save and is knocked prone, or half as much on a success and is not knocked prone.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.