Dragonfire

You transform your lungs to those of a dragon. Choose a damage type: fire, cold, lightning, poison, or acid. When you cast the spell, and as your action each round for the duration, you may create a 45 foot cone which deals 16d6 of your chosen damage type.  Creatures within the cone must make a Dexterity saving throw. On a success, they take half damage. In subsequent turns you may use your action to create the same effect, on a Recharge 5-6. The cone is not considered to be a magical effect.

For the duration, you can speak Draconic and have advantage on Intimidation checks.