A headgear-like device that emits sound waves to issue commands inside a person's mind, perfect for subordinates. It wouldn't harm anyone else nor affect their thoughts and actions, but it ensures loyalty by triggering a direct command in the brain whenever betrayal is contemplated.
High technology truly lives up to its name, inventing such gadgets.
Last time, the thing she gave Ye Wenzheng was just a regular pill that could enhance his physique, not poison at all.
Now, with this device, it only takes a few seconds to take effect, all set up by La Sike. It's easy to operate, doesn't affect others, and maintains loyalty.
However, there's one condition; it must be worn voluntarily, or else the settings inside the headgear will damage the wearer's brain. This also ensures the safety of others, preventing the scenario of enslaving everyone in the world.