A Relic Of An Ancient Past.

The entire base is not touching the ground with its bottom. Instead, there are four stands that lift it up. The golems or bots that the base is creating exit it from the base. It is as if the base is laying eggs. 

These bots that the bade produces mine the surroundings and then bring the resources that they have acquired back to the base for refinement and other purposes. 

"I can leave the base for a while. It should be safe for a short while."

He decided to go and get Legion-7 now. His base can protect itself for a while and no one should be so jobless as to attack him now. The position for first has already been filled and there is no reward for second so anyone who is still fighting instead of setting up their own base at this time is wasting time.