Draining Smite

The first time you hit with a melee weapon attack during this spell’s duration, your weapon swirls with shadows which drain the life of your foe. The attack deals an extra 2d6 necrotic damage to the target. Additionally, if the target is a creature, it must make a Constitution saving throw or you regain a number of hit points equal to half the necrotic damage dealt.

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