Draining Kiss

You kiss a creature that is Charmed by you, Willing, Unconscious, Paralyzed, or Restrained. The creature takes 2d10+ your spellcasting modifier Psychic damage, or half on a successful Constitution saving Throws. You heal for half of the damage dealt into false life. The creature additionally has it’s maximum hit points reduced by the amount of damage taken. This lasts until the target takes a long rest. The target dies if this reduces their maximum hit points to 0.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d10 for each slot level above 1st.