Dragon's Infernal Command

This spell allows you to manipulate flames with the ferocity of a dragon's breath. When you cast Dragon's Infernal Command, you create a 30-foot radius circle of intense flames centered on yourself.

Any creature that starts its turn within the area of effect must make a Dexterity saving throw or take 6d6 fire damage. On a successful save, the creature takes half damage.

Additionally, you can manipulate the flames to a limited degree, allowing you to target specific creatures or areas with intense bursts of heat and fire. As an action on your turn while concentrating on the spell, you can create a line of fire up to 60 feet long and 10 feet wide that extends from the edge of the area of effect. Any creatures in the path of the line must make a Dexterity saving throw or take 3d6 fire damage. You can also use an action to change the shape and size of the area of effect, making it wider or narrower and targeting specific creatures.

Furthermore, you are immune to fire damage while concentrating on the spell, and you gain advantage on Intimidation checks made against creatures within the area of effect.

When you cast this spell using a spell slot of 7th level or higher, the damage from the area of effect and line of fire increases by 1d6 for each level above 6th.