Post-Hypnotic Suggestion

You can use this ability to induce a Post-hypnotic amnesia in a subject. The subject can not  recall events that took place while under hypnosis. During this hypnosis, you implant  a trigger word. Whenever you encounter the subject again,  you use the trigger word to cause all the subject's saving throws  involving you to be at disadvantage. The trigger word implantation becomes ineffective after 30 days. You as the hypnotist, will roll with advantage against the subject while hypnotized.