Blackstone's bombardment bug bombs

This spell creates 4 bug like missles that upon reaching the target deliver one point of force damage, the target must succeed on a DEX saving throw against the casters spell DC, on a failed save the bug explodes. The explosion covers in entire five foot area the target and all additional creatures in the space take an additional 3D6 of force damage, on a successful save they take half damage. The missiles can converge on one target or hit up to 4 different targets.

For each spell slot over third the Spells range increases by 10 ft and the explosion radius increases by 5 ft.