Eldritch Fire

You spray magical fire in a 15-foot cone. Every creature in the vicinity of the spell must make a DC 15 Dexterity saving throw, taking 4d8 fire damage on a failed save, or half as much damage on a successful one. Each creature hit by the spell must make a DC 10 Constitution saving throw at the beginning of its turn, taking 2d6 fire damage on a failed save, or half as much damage on a successful one. The fire can only be extinguished by being completely smothered, and cannot be extinguished by water.