Death's Shadow

By touch, you transfer a small amount of negative energy directly to a creature that attacks and disrupts their vital organs before dissipating. You touch a living creature, and that creature must succeed on a Constitution saving throw or takes 5d6 necrotic damage. This damage is regained after 1 minute if the creature does not fall unconscious.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d6 for each slot level above 1st.