Yu Sheng had actually thought it through--he wasn't a "professional."
Of course, if one went by his business license, he was indeed a certified Spirit Realm Detective. Among ordinary people, that counted as a professional who dealt with supernatural phenomena. But in a situation requiring this much expertise, he still knew his own limits.
If he encountered an unfamiliar Otherworld and was asked to map it out using his fearlessness, or ran into an unknown entity and was sent over to test the waters, or even faced a Dark Angel he couldn't beat and was thrown over to get himself beaten half to death, he would have no problem. But this tower was clearly some high-level cultist stronghold, the kind that concealed a pile of secrets. Sending an ignorant hothead like him inside to investigate would only cause trouble. Whether he could find anything was uncertain, but dying inside immediately was practically guaranteed.
He wasn't afraid of dying, but he wasn't willing to end up dead without even earning an assist, only leaving a pool of blood behind. Besides, if he recklessly charged in and gave away his life, he might even cause trouble for the actual investigators who came later.
With that in mind, he messaged the Special Operations Bureau to explain the situation and said he would observe from a safe area nearby. Then he led Huli and the others to the edge of that "Polluted Land," hiding in a cluster of "bushes" overgrown with crystal formations. While waiting for the Special Operations Bureau's team to arrive, they kept an eye on the high tower's movements.
Everything was quiet. The tower still stood silently at the center of the dark land. The tower and the vast stretch of bizarre terrain around it were like a jarring, incongruous scar