Din's Fire

You create a sphere of fire emanating from a point you touch that spreads out to a radius of fifteen feet. Each creature besides you in this sphere must make a Dexterity Saving Throw or take 4d6 fire damage. On a successful save a creature takes half damage.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d6 for each slot level above 2nd.