Zhao Hai sat in his interspace and looked at the screen. There was a special construction team on the screen. The team was made up of zergs. They were digging holes around the refining Valley and glued the holes with bug glue so that no one could see what was going on in the holes with their spiritual power.
The reason why Zhao Hai used the tool refining Valley as the center was that it could provide him with power. He wanted to use the tool refining Valley as the center to build a huge underground base. This underground base could be protected by defensive arrays. All arrays needed power, and the underground magma in the raging fire Valley was the best free Power.
Although Zhao Hai had already taken it from fire god city, the heart of Earthfire was still there as a source of energy. Moreover, the heart of Earthfire seemed to be growing, so Zhao Hai wasn't worried about running out of energy.
