Wyrd Reconstruction

You raise your arms and channel the power of the occult to haphazardly mend a creature's wounds, with risk of injury. Target a humanoid within range. It regains 1d12 + your spellcasting ability modifier Hit Points and makes a Constitution saving throw (DC 20 minus your spellcasting ability modifier). On a failed save, the target takes 3d6 necrotic damage.