William could tell how arrogant and full of himself this man was. And yet he didn't act like this with him. Instead, he turned to William and started to explain things over.
From what he said, and he spoke in great detail, this formation was something devised a long time ago to overcome the troublesome fate and destiny protected figures.
Using this formation would lessen the severe backlash expected from spying over the fate and destiny of people like William by folks like this man. At the same time, there were few limitations, and little risk here and there.
For example, for the formation to work, the person in question had to be present and fully cooperative. Without the consent and cooperation of William, this formation wouldn't work.
