Draining Kiss

Choose a humanoid that you can touch. The target must be either Charmed by you or an otherwise willing participant. The target could also be a humanoid that is Paralyzed, Stunned, or Unconscious.

You kiss the target draining its life -  it takes 1d6 necrotic damage, and you gain temporary hit points equal to the damage dealt. After kissing the target, the spell ends. If the target was Charmed by you, this spell does not break the Charmed effect.

This spell’s damage increases by 1d6 when you reach 5th level (2d6), 11th level (3d6), and 17th level (4d6).