After entering the Yellow Sand Vortex, a shadowless pressure came over Lin Mo's face. He resisted slightly, but the intensity of the attraction rendered his resistance ineffective, and then his vision went black as he was sucked into the underground city along with others.
A moment later, that attraction disappeared from his whole body. Lin Mo focused and found himself in a long, black corridor. The corridor wasn't completely dark; instead, there was a dim light.
"Is this the underground city?"
Lin Mo frowned, standing with his palm against the wall of the corridor. The touch was cold, and it was unclear what special stone it was made from.
"Hmm?"
Suddenly, Lin Mo felt a bumpy sensation under his palm. As he touched it carefully, he could feel slight patterns on the wall, but these patterns weren't any magic patterns; instead, they were just ordinary decor.
"Why are there patterns carved on these corridors?" Lin Mo frowned, looking perplexed.
