```
When Robert asked, Guding nodded, "I've brought everything. Do we use it now?"
Robert took out a palm-sized metal device from the storage space, "Find this mini excavator. If it's just me alone, this would be enough, but now that there are three of us, the tunnel will need to be wider."
Guding and Liliya rummaged through the storage space, quickly finding a metal device identical to the one in Robert's hand.
Robert took the devices from the two of them, pressed the start buttons in succession, and tossed them on the sand. The originally flat devices suddenly sprouted legs, resembling long-legged spiders, and quickly burrowed into the sand layer. On the surface, a deep hole soon appeared.
Then he placed a hand on the sand, and a stream of silver metallic liquid rapidly spread into the sand from his metal palm. In that instant, Guding and Liliya seemed to notice some changes at the entrance of the hole.
