Darkfire Feild

You create a 20-foot-radius sphere of mysterious dark flames on the ground centered on a point within range. The sphere spreads around corners and up walls. Any creature that ends its turn in the flames takes 4d6 fire damage and 4d6 neurotic damage. Any creature caught in the radius when the spell is cast must make a dexterity saving throw or suffer 4d6 fire damage and 4d6 neurotic damage. A successful throw negates the fire damage and half of the neurotic damage.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the radius of the flame increases by 20 feet for each slot level above 5th.