Death's Mercy

The creature is momentarily surrounded by either a green cloud of death or a golden cloud of life. If you choose Necrotic damage it makes a Dexterity saving throw, taking 2d10 Necrotic damage on a failed save or half as much damage on a successful one. If you choose Healing than the creature is healed for 2d10.

Using a Higher-Level Spell Slot. The damage increases by 1d10 for each spell slot level above 1.