After a quick check, Chen Mu found that everything was still there, and the stone weighing on his heart finally dropped. The most precious thing he carried was the Mysterious Card. He was gradually beginning to understand its value.
Suddenly, a wave of belated fear swept through him. As he was now, he had no way to protect the Mysterious Card. An innocent man could become guilty simply by possessing a treasure. He had not merely heard of such things; he had witnessed them many times.
If... if someone paid even a little attention to this card...
Chen Mu shuddered despite the lack of cold!
"What's wrong?" Ning Dong keenly noticed the change in Chen Mu.
"Nothing," Chen Mu answered with feigned calm, though inwardly he was on his guard. He could not afford to give himself away.
To distract himself, Chen Mu began examining the cell. It was built from immensely thick blocks of stone, mottled gray and bluish gray, and looked utterly cold. Chen Mu had seen this kind of rock before. It was extremely hard, and the walls were at least three meters thick. Without powerful tools, escaping from a place like this was impossible.
Chen Mu noticed faint cutting marks on the smooth, even surfaces of the stone blocks. The marks were inconspicuous and mostly palm-sized. They seemed to have been made with some small, palm-sized tool.
Seeing Chen Mu studying the cutting marks, Ning Dong explained, "All this gray-green rock was cut by the Ning Family's disciples using Wave Blades. Every disciple who learns to use a Wave Blade has to spend a year cutting gray-green rock at the quarry. Heh, this rock is extremely hard. Even cutting it with a Wave Blade is no easy task."
Chen Mu was astonished. Though he had guessed