Bolgrums Dark Detonation

You cause the black sand used in the casting of the spell to form into a ball of hyper dense black glass a tiny singularity at its core. You launch this projectile forward detonating it at a point you can see within range. All creatures caught in its area must make a dexterity saving throw or take 7D6 force damage on a failed save or half as much on a successfull one. The damage of this spell increases by 1D6 for every spell level above 3rd. Additionally the spell deals double damage to structures.