Bone Blaster

You point a direction of your choice. A skull with the design of your choice appears. The skull then shoots a laser that is 60 ft long and 5 ft wide. Any creature in the area has to make a dexterity check. On a failed save, the creature takes 6d6 force damage and takes 3d6 force damage on consecutive turns. On a successful save, a creature takes half damage and does not take damage on later turns. The spell deals and additional 1d6 damage for each level above 3rd.