Chromatic Explosion

A chaotic orb of pulsating energy erupts from your outstretched palm towards a point you can see within range. Each creature in a 20-foot-radius sphere centered on that point must make a Dexterity saving throw. A target takes 8d6 fire, cold, lightning, or acid at random on a failed save, or half as much damage on a successful one. Roll a d4 to determine the damage type.

This spell temporarily disrupts magical effects; any creature who makes a concentration saving throw as a result of this spell rolls at disadvantage for the save. 

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.