Vampiric Drain

Vampiric Drain. Using your bite attack, you deal 1d6 + your Strength modifier in piercing damage plus 1d6 necrotic damage. The target’s hit point maximum is reduced by an amount equal to the necrotic damage taken, and you regain hit points equal to that amount. The reduction lasts until the target finishes a long rest. The target dies if this effect reduces its hit point maximum to 0. You can only use this attack once per turn but twice a day.

At Higher Levels. When using this, the damage will increase every third level until level 20.