In the end, he had been robbed by people one after another. It seemed that the black illum crystal was not as simple as he had thought, and there must be some effects he didn't know about!
"Senior brother Sima, the most precious thing in my family's mine is the Yunying iron ore. It's used to refine weapons and has nothing to do with the black lustrous crystal, so I don't know much about it."
Zhang Yiming scratched his head and felt embarrassed that he couldn't help. He could only try his best to say,""I've heard of the Obsidian Crystal, but I'm not sure. I only know that it's very rare and has a very low production. It's said that there was a piece of Obsidian Crystal in a mine. Yes, there was only one piece in the entire mine!"
