In Chapter 137, Wang Yu said the doubts in his heart, "it turns out that it is this. The spirit mine is nearly a hundred li long, and the reserves of spirit stone are not small, but the underground excavation is very difficult. At present, only one third of them have been excavated. This one third has been used by our school of magic for hundreds of years. The supply of spirit stone in the school is not enough, but the speed of excavation is as slow as before The snail, in addition to the monsters, is really powerless. The land we stand on is the place where we have...