Arcane Overload

Make a melee spell attack with disadvantage against a creature you can reach. On a hit, the target takes 12d10 force damage.

A creature killed by this spell explodes, sending bones and viscera in all directions. Each creature within 10 feet of the target must make a Dexterity saving throw. A creature takes half of the inflicted force damage as piercing damage on a failed save, and no damage on a successful save. You automatically succeed on this save.

When you cast this using a spell slot above 5th, the damage of Sandstorm increases by 2d10 for each spell slot level above 5th.