Tassiter's Tactful Barrage

An arrow fires from the bow into the sky, causing a rain of spectral arrows to fall on a 15-foot radius area centered on a point within range. Each creature within the area must succeed in a Dexterity saving throw or take 4d6 piercing damage, or half as much on a successful save. 

Proficiency with the bow used to cast this spell increases the save DC by half of your proficiency bonus, rounding up. 

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d6 for each slot level above 2nd.