You have gained the ability to unleash your breath weapon in a focused line of raw energy. When you use your Breath Weapon, you can choose to exhale it in a line that is the same size as your normal breath weapon and is 5 feet wide (if your Breath Weapon is in a cone) or in a line that is the same size as your normal breath weapon but 5 feet wide and half as long (if your Breath Weapon is in a cone). Creatures in the area of your modified Breath weapon must make a Constitution saving throw against your Breath Weapon save DC, taking half the normal amount of damage that your normal breath weapon does and be vulnerable to the damage type dealt by your breath weapon for 1 minute on a failure, or half as much damage and no other effects on a success.
If you choose this feat at a higher level or higher growth stage, the width of the line increases by 5 feet.
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