Damned Rebuke

You speak a threat or taunt in Abyssal to a creature that has just damaged you, and the creature that damaged you is momentarily surrounded by the cold Grasp of the damned. The creature must make a Dexterity saving throw. It takes 2d10 necrotic damage on a failed save, or half as much damage on a successful one. You regain half the necrotic damage done as Temp HP

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d10 for each slot level above 1st.