Bone Bomb

A glowing spectral skull flashes from your pointing finger to a point you choose within range and then blossoms with maniacal laughter into an explosion of bone shards. Each creature in a 20-foot-radius sphere centered on that point must make a Dexterity saving throw. A target takes 6d6 fire damage and 1d12 piercing damage on a failed save, or half as much damage on a successful one.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the fire damage increases by 1d6 for each slot level above 3rd.