Breath Weapon: Acid

You can use your action to exhale destructive
acid in a 5' X 30' line. When you use your breath
weapon, all creatures in the area must make a Dexterity saving throw. The DC of this
saving throw is 8 + your Constitution modifier +
your proficiency bonus. A creature takes 2d6
damage on a failed save, and half as much
damage on a successful one