Bone Splinter

You conjure a shard of jagged bone and  hurl it at a creature within range.

Make a ranged spell attack. On hit, the target takes 1d8 piercing damage, and if the target is a creature with flesh, it must succeed on a Constitution saving throw or take 1d4 necrotic damage as the splinter festers.

Damage increases by 1d8 and 1d4 at 5th, 11th, and 17th level