Circle of the Wyrm breath attack

You can use your action and expend one spell slot to exhale draconic energy from your mouth. Choose a damage type: acid, cold, fire, lightning, or poison. Each creature in a 30-foot cone must make a Dexterity saving throw. On a failed save, a creature takes 2d10 damage of the chosen type, plus 1d10 for each spell level higher than 1st. On a successful save, a creature takes half as much damage.