The tens of thousands of captives that were locked inside the camp would certainly produce a huge amount of bodily waste on a daily basis, most of which was directly discharged to the icy ocean through a canal below the surface of the ocean.
Every drainage canal was more than half a meter in diameter and easy for an adult to crawl in. Therefore, Elder Nether Spring had deployed dense crystal wires on the exit of the drainage canals with defense rune arrays that could send powerful electric arcs and freezing coldness over to the web.
If Li Yao damaged the crystal wires, the guards above would certainly sense it.
The holes between the crystal wires were too small. Li Yao was not confident that he could sneak through them in Neltharion without alarming anyone.
However, it was not a problem for him.