Weird Reconstruction

A creature of your choice that you can see within range regains hit points equal to 1d20 -1. Then the target must succeed a DC 18 Constitution saving throw. On a failed save, the target takes 2d4 necrotic damage. This spell has no effect on undead or constructs.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the DC for resisting the damage is reduced by 1 for each slot level above 1st.