Hearing Wu Wenzhong's words, Qin Fengming's expression grew increasingly solemn. He truly could not hear anything suspicious in the other's words.
Black Iron Valley was a vast valley. It was called vast because it was not merely a valley, but a broad region covering a radius of dozens of li.
It was named Black Iron Valley because every rock throughout that vast valley contained a hard substance called Black Iron. Because the proportion of this substance was extremely high, all the rocks were incredibly hard. Even a Integration stage cultivator's life-bound weapon could only leave a shallow mark when cleaving them.
Rocks containing Black Iron could not be entered at all; every method was blocked.
Not to mention Integration stage cultivators—even peak Spirit Severing stage cultivators found it difficult to enter rocks containing Black Iron.
Furthermore, another extremely strange phenomenon appeared in that vast valley. When cultivators stood among the mountains, they would feel an ethereal sensation, as though the surrounding rocks and peaks did not exist. The lower their cultivation, the stronger this feeling became.
However, this ethereal sensation was merely a feeling and did not mean the surroundings were truly illusory. The rocks around them were real. As long as one investigated with powerful divine sense, one could confirm that they were solid entities.
Aside from that sensation, the mountainous region contained no vegetation whatsoever apart from the rocks containing Black Iron. It could be said that Black Iron Valley was utterly desolate, with nothing of value existing within it.
Although they felt that ethereal sensation, the Wu Household's people were still certain that the place contained none of the precious items they sought.
The Wu Household was so certain because several late Spirit Severing and peak Spirit Severing clan elders from E'shan City had personally gone there