Eldritch Boom

Compressing eldritch energy, you hurl a destructive sphere to a point within range that you choose.  The sphere detonates, releasing a wave of percussive energy that slams into every creature within a 20-foot-radius centered on that point.  The wave spreads around corners.  Each creature within that radius must make a Constitution saving throw, taking 5d6 Force damage on a failed save and is now stunned; on a successful save, the creature takes half damage and is not stunned.  On a critical fail of the saving throw, a creature is knocked unconscious.

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.