Draconic Blast

You create a blast of elemental energy in the form of a 20-foot cone or a line that is 30 feet long and 5 feet wide (your choice). Choose a damage type: acid, cold, fire, lightning, or poison. Each creature in the area must make a Dexterity saving throw against your spell save DC, taking 2d8 damage of the chosen type on a failure, or half as much damage on a success.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d8 for each slot level above 1st.