Deathflash

Dark particles levitate around your finger as you point at a space within range from which an ominous orb of flashes for a moment. Each creature in a 20-foot-radius sphere centered on the  point you have chosen must make a Dexterity saving throw. A target takes 6d8 force damage on a failed save, or half as much damage on a successful one.

If you are hit with the full brunt of the force you must make a Strength saving throw or be knocked prone.