Chromatic Nova

You call forth a wave of energy which impacts all creatures within a 20 ft. radius centered on you. You choose acid, cold, fire, lightning, poison, or thunder for the type of nova you create, and then creatures in the area must make a dexterity save against your spell save DC. The creatures take 3d8 damage of the type you chose or half as much on a successful save.

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