Eldritch Shockwave

A wave of thunderous arcane force sweeps out from you. Each creature in a 20-foot cube originating from you must make a Constitution saving throw. On a failed save, a creature takes 2d8 force damage and is knocked prone. On a successful save, the creature takes half as much damage and is pushed back 10 ft from you.

In addition, unsecured objects that are completely within the area of effect are automatically pushed 15 feet away from you by the spell's effect, and the spell emits a somewhat thunderous magical warping sound audible out to 130 feet.

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