C637 Mysterious Blackstone

Black lines?

Following the direction in which Luo Tian pointed, Zheng Wenhai and the other three looked at the slender black line on the jade pearl at the same time, and their eyes instantly lit up!

That's right! In ancient times, stories were mostly about grasping the flaws of a certain detail, then enlarging it, fantasizing it, and making up for the deficiencies