On the final page of the booklet was a pattern. It looked as if countless lines had been linked together, appearing exceedingly chaotic at first glance, yet upon closer examination, one could see that it was in fact highly ordered.
According to the note, this pattern had been passed down by the Profound Court. Anyone with mystical abilities need only visualize it to determine whether they had been parasitized by some external thing. This was not limited to nightmare demons.
Zhang Yu fixed his gaze upon it and quickly reflected the pattern into his mind. After only a moment, he felt as though he were sinking downward, while everything around him receded into the distance.
He could clearly sense that he had already sunk into the depths of his consciousness, and he could distinctly perceive everything around him.
According to the note, if one saw multicolored flickering light here, one had to be careful. Nine times out of ten, it meant a nightmare demon had set its sights on them. They would need to drive it out as soon as possible, or simply shut themselves away and avoid all contact with others while waiting for a suitable person to come rescue them.
Now, after sweeping his gaze around, he saw that his consciousness was empty, without a trace of external contamination.
This showed that he had not been affected by any nightmare demon.
This was no surprise. He had only arrived in Azure Yang Upper Continent a day ago, and almost the moment he stepped off the flying vessel, Wen Yi had sent him here with a Cold River Worm. Unless it was too great a coincidence, there had likely not even been time for such a thing to target him.
Though he himself was unharmed, he still needed to