Chapter 1399: Clues in the Relief

Monica Lyson studied the wall with keen interest. "Ethan, is this really a relief?" Ethan nodded. His visual acuity was far better than the others', but he hadn't been paying attention to the wall before and had missed it. When he looked back along the passage, he realized the relief didn't begin at the entrance. It started only about twenty meters behind them. The relief didn't continue much farther ahead, either. Judging by what they could see, it covered roughly a hundred meters in total. The...