Bone Shards

This spell uses the skeletal remains of a corpse to create a projectile weapon. You target the corpse of a creature that lacks flesh and that isn't affected by the Gentle Repose spell or a similar effect. Fragments of bones from the corpse splinter off and fly toward another target within 60 foot of the skeletal remains. On a successful ranged spell attack, the target takes 3d6 damage Piercing damage. Skeletal remains are destroyed if these are not a creature.

If the skeletal remains used are an Undead creature (like a skeleton), the creature makes a Constitution saving throw. On a failed save, the target takes 1d10 Force damage. On a successful save, no projectile is created.

Using a Higher-Level Spell Slot. You can target one additional skeletal remains or Undead creature for each spell slot level above 1.