"Master, world stones can promote the growth of the spirit map world," Xia Qing said. "As long as there are enough world stones, the spirit map world can expand quickly."
"World stone?" Xia ruofei revealed a doubtful expression and said,"I once gave Ling tukong ... Ling tu world to absorb jadeite. Xia Qing, is the world stone you're talking about jadeite?"
Xia Qing shook her head and said,"master, as far as I know, the jadeite contains a very small amount of world stone. If the spirit map world absorbs a large amount of it, it can also expand. However, the amount required is extremely large."
"Then what is a world stone?" Xia ruofei asked subconsciously. Then, he had a flash of inspiration and quickly asked,""Xia Qing, the world stone you mentioned, is it a type of black stone?"