Cold Breath

As an action, instead of making an attack roll, you create a cone of cold in a 15-foot cone or 30 foot per 5 foot line. All creatures in that area must make a Dexterity saving throw. On a failed save, a creature takes 2d8 cold damage and can't take reactions until the end of your next turn. On a successful save, a target takes half as much damage and suffer no additional effect.

The piercing damage increases to 4d8 when you reach 17th level in this class.