Dragon's Inferno

You summon a column of roaring flame at a point you choose within range. The column is 20 feet high and 10 feet in diameter. Each creature in the column’s area must make a Dexterity saving throw. On a failed save, a creature takes 6d6 fire damage and is blinded until the end of your next turn. On a successful save, a creature takes half as much damage and is not blinded. The fire spreads to other flammable objects in the area that aren’t being worn or carried.