Curse

Focusing dark magic upon an individual of your choice, you force a charisma saving throw on the target against your spell DC. Failing that, their hit point maximum is immediately halved, and they cannot dispel it unless it is passed into another living being. This could be a small animal, a plant, even an undead creature. It can also be removed with a wish spell. The process of removing the curse takes 8 hours, where the cursed individual must be in physical contact with another for the entire time, uninterrupted. Both creatures must be at their maximum hit points.