Incident in Midnight Sovereign

Could it be someone who wanted to ask him to make something, who was now looking for him, used a prophecy spell? That would be so wasteful!

It was commonly believed that prophecy spells posed the strongest backfire hazard among all arts. People almost never used such spells to directly predict the result of something, since such attempts easily provoked the world's consciousness. When trying to look for someone, a prophet usually looked for other less relevant matters first. The prophet would then deduce the location of the target by referring to the stars, the weather, or the layout of stones. This was why prophets always acted absurdly in the views of people.

Now that Angor felt his "isolation" effect swaying, it was obvious that someone was checking on him directly.

And if a prophecy spell was involved, whoever that did it aimed to get his location immediately. It was a dangerous act.