Chapter 172: Severe Injuries The massive grinding of stone and the whistling of wind roared in my ears. Simultaneously, a much louder sound emerged. At first, I thought it was the resonance of dozens of stone beams moving in unison, but after listening for a while, I realized with a jolt of alarm that it wasn't. The realization hit when my leg brushed against a relief on the rock wall. It was a turtle-faced immortal holding a banner. This immediately put me on high alert, because this rock wall…