Thread:SecondOpinion/@comment-26381576-20180204114023/@comment-5688420-20180209120942

It's a reference to his experimental "black zest" drug, a self-created two-in-one hallucinogen and twilight anesthesia in liquidized foem, which he then uses to sedate his victims (preferrably women) by injecting them through the belly button. All the while, he uses the time to kill his victims.