Chromatic Bomb

You hurl a 10-inch-diameter orb of energy at a point that you can see within range, which then releases the energy within the orb. Each creature in a 20-foot-radius sphere centered on that point must make a Constitution saving throw. You choose acid, cold, fire, lightning, poison, or thunder for the type of orb you create.  A target takes 6d8 damage of the chosen type on a failed save, or half as much damage on a successful one.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage increases by 1d8 for each slot level above 4th.