The subterranean corridor is winding and deep, with no space for idling.
There's no visible exit ahead, nor is there any light behind.
As Zheng Qing and Old Yao walk through, the only sounds are their echoing footsteps and Old Yao's incessant explanations.
Despite being a professor, Old Yao might have a bit of a temper, but his penchant for teaching runs deep. Even when simply explaining the concept of the 'Causality Turning Curse' to Zheng Qing, he tirelessly provides numerous examples and elaborates on numerous details.
For example, it is from him that Zheng Qing learns that the 'diet' of the demons in the hunting grounds is very particular.
To lower the 'death' difficulty, the wizards at the school issue a priority command of 'swallowing' to the creatures when binding them with magic. This encourages them to swallow their prey whole after killing, reducing the pain felt by students during their death process.