In the Underground Secret Realm, within a mysterious space.
Xu Feng looked at a giant blue crystal column that had a diameter of thousands of feet and a length of over ten thousand feet.
Before coming here with his beloved disciple, Xu Feng had imagined many forms of innate treasure embryos, but he had never thought that the innate treasure embryo would actually be a pillar.
"When I first discovered this innate treasure embryo, I was also surprised. After giving it some thought, I felt that refining an innate treasure vessel for my master would be most appropriate."
"If the refining is successful, in times of danger, master could enter it, and I estimate even a Second Realm expert would not be able to harm him."
Although it wasn't the first time he had seen it, Sheng Yu still had a look of admiration in his eyes when he saw the giant column again.
"This is a gigantic column with the attribute of space; it can accommodate at least thousands of minor worlds within."
