Droughtfang's Heatwave

You begin to heat the air around you making it unbearable for others in you vicinity. Any creature that starts its turn in the radius must a CON saving throw. On a failed save, a creature takes 5d8 fire damage and their speed is halved (if a creature fails this save twice they take 1 point of exhaustion). On a successful save, it takes half damage and its speed is unaffected.

At Higher Levels. When you cast this spell using a spell slot of 7th level or higher is increased by 1d8 for each spell slot level above 6th.