Breath Weapon: You can use your action to exhale destructive icy cold cone.
When you use your breath weapon, each creature in the 15ft Cone of the exhalation must make a Constitution saving throw. The DC for this saving throw equals 8 + your Constitution modifier + your proficiency bonus. A creature takes 2d6+CON damage on a failed save, and half as much damage on a successful one. The damage increases to 3d6 at 6th level, 4d6 at 11th level, and 5d6 at 16th level.
You can use the breath weapon a number of times equal to your proficiency Bonus