C7368 Where the Shadow Came from

"Looks like to make them useful, a large amount of black stones must be provided. It's just that I don't know if only the Ninth Grade black stones can be used, or other grade black stones." Qin Ming thought for a while and took out some ordinary black stones from the Dimensional Ring.

These black stones were of the Fifth Grade, the Sixth Grade, the Seventh Grade, and the Eighth Grade. However