I react poorly to blood donation and have had these used on me, they are incredibly unpleasant. There’s no lasting harm, and they do work very well. Basically imagine a chemical burn throughout your nose, sinuses, and upper respiratory system that lasts 30 seconds. It works immediately and gets a very strong reaction
Maybe it is actually cursed. The curse is that while you wear it your life goes by faster but if you remove it you slow down. Most people get too greedy and slow their life to a standstill but you are actually using it perfectly to enjoy your free time at night and less time during your work