Vampiric Smite

The next time you hit a creature with a weapon attack before this spell ends, the weapon gleams with astral radiance as you strike. The attack deals an extra 2d6 necrotic damage to the target, which heals you if the target is living or undead 1 hit point per 2 damage dealt.

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