C273 Domineering

Previously, Xiao Cheng had already drawn the design and refined it very quickly. The characteristics of the obsidian was similar to the Thousand Rock Sand, but the solubility seemed to be higher. Inside the refining room, Xiao Cheng was staring at the crafting furnace in front of him.

"Bang!"

Suddenly, Xiao Cheng woke up from his sleep with a loud noise