Draining Smite

With this spell you drain 2d8+3 health from the target on your next successful weapon attack.Your weapon inflicts its normal damage and the additional points you drained in necrotic damage.  The health you drained is transferred to you as Temporary Hit Points.

At higher levels. When you cast this spell using a spell slot of 2nd level or higher, the initial extra damage/healing dealt by the attack increases by 1d8 for each additional spell slot used.