Black Flame Ritual

Summons a circle of black flame pillars around the caster in a 15 foot radius. Enemies inside the area must make a Wisdom saving throw. On a failed save, a creature takes 5d8 fire damage, or half as much damage on a successful save. A creature who fails the save is covered in the black flame, the next 2 turns they take 2D8 fire damage. 

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.