Energy Ball

Each creature in a 20-foot-radius sphere centered on that point must make a Strength saving throw. A target is knocked prone on a failed save, or isn`t prone on a successful one.  After each creature in the 20-foot-radius, if they made the first save, must make a Dexterity saving throw. A target takes 6d8 psychic damage on a failed save or if the target is prone, or half as much on a successful one.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d8 for each slot level above 3rd.