Draining Kiss

You drain the life from those you kiss. The target must make a Constitution saving throw contested against your spell save DC, taking 1d4 Psychic damage on a failed save. You gain a number of temporary hit points equal to half of the damage dealt rounded down. The target's hit point maximum is reduced by the number of Psychic damage. The target dies if this effect reduces its hit point maximum to 0.

The damage of draining kiss increases by 1d4 when you reach 5th (2d4), 11th (3d4), and 17th (4d4) level.