Draining Kiss

You have the ability to drain the life from those you kiss. The target must make a Constitution saving throw contested against your spell save DC, taking 1d8 Psychic damage on a failed save, or half as much on a successful save. The target's hit point maximum is reduced by an amount equal to the damage taken, this reduction lasts for 1 hour. The target dies if this effect reduces its hit point maximum to 0.

The damage of draining kiss increases by 1d8 when you reach 5th (2d8), 11th (3d8), and 17th (4d8) level.