As for the mechanism by which this poison acted, Shu Guan, having no knowledge of alchemy, naturally had no clue, but he supposed not every victim voluntarily succumbed to the poison. The kind of despair, pain, and pleading in Patrick's eyes before his death suggested he certainly didn't wish to die like that.
Perhaps it was related to an individual's psychological state, or even their thoughts at that moment. Maybe the poison would be triggered when a person was likely to reveal secrets.
While the idea was astonishing, that poison wasn't an ordinary drug, but a product of alchemy, possessing extraordinary traits, especially since it was from the incredible GLH Company.
Regrettably watching Patrick die before him, a memory suddenly resurfaced in Shu Guan's mind.
It was the vision he had glimpsed through the One Palm Scripture of the poison's creation, using the Dan Withdrawal Technique that Wang Runling had performed on the extracted vial.