Breath of the Dragonborn People

 You touch any creature and give it the power to expel magical energy from its mouth, if it has a mouth. Choose from acid, cold, fire, lightning, poison, or water (bludgeoning damage).  AS PART OF THE SAME ACTION IN WHICH THE SPELL WAS CAST, the creature exhales the energy of the chosen type in a 15-foot cone. Each creature in that area must make a Dexterity saving throw, taking 2d6 damage of the chosen type on a failed save, or half as much damage on a successful one.

At higher level:  

When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d6 for each slot level above 1st level.