Buckshot

This is an implementation of the Buckshot spell from Tasha's Crucible of Everything Else

You quickly replicate a ball bearing at a high velocity in a 15-foot cone. Each creature within the cone must succeed on a Constitution saving throw or take 1d6 piercing damage. This damage ignores swarms’ resistance to piercing damage. The replicated ball bearings disappear immediately after the spell.

This spell’s damage increases by 1d6 when you reach 5th level (2d6), 11th level (3d6), and 17th level (4d6).