He just didn't know where such a useful thing came from.
Li Yuanqing had been brooding over what those demons had said. They had said that humans were cursed here. In Li Yuanqing's opinion, this sentence should mean that the Black Dragon had cursed all humans and restricted their cultivation.
But now, it seemed that something was wrong. After the humans cut off the restrictions of the Black Dragon, the increase in their strength was not that obvious. At least, compared to the world on the surface, it seemed to be a little inferior.
The most important thing was that there were so many rich resources underground. Logically speaking, there should be quite a number of spirit veins, but the humans could make use of so little. Why was this? Those demons definitely knew something.
However, Li Yuanqing did not waste any time talking nonsense with them. He directly wanted to kill them all. As for the reason behind this, he would probably have to slowly explore it himself.