The sudden change instantly put Mo Yu on edge.
Hearing Wang Long's shout, Mo Yu immediately turned toward the area where rows of tents had been set up and called out:
"All personnel, prepare for battle!"
The underground plaza immediately erupted into chaos. Warriors who had been on rotation quickly donned their equipment and emerged from their tents, their expressions tense.
Mo Yu then turned and walked over to Wang Long at the entrance of the Metal Passage, asking:
"Brother Long, what's going on?"
"The Black Wind Domain Field suddenly expanded. It should be about to cover this area. We're hiding underground for now, so don't go out. Try contacting reinforcements first."
As he spoke, Wang Long's expression was solemn, completely lacking his usual joking demeanor.
After hearing Wang Long's explanation, Mo Yu's expression also grew grave.
Sudden expansions of Domain Fields were uncommon on the frontlines, but they did happen from time to time.
That was also the main reason the construction team had chosen to build the Temporary Research Station underground. Even if nearby Domain Fields suddenly expanded, they would have time to react.
The forces behind such expansions were generally the ruling powers within the Domain Field seeking to enlarge their territory, or waging war against neighboring Domain Factions to plunder their resources.
Without wasting time on sentiment, Mo Yu immediately picked up the communicator hanging at his waist. After adjusting the channel, he said:
"Xiao Kong, see if you can establish contact with the Supply Zone and request reinforcements."
After a brief silence, Yan Kong's voice came through from the other end:
"Trying to connect now, but it seems the Black Wind Domain Field has already covered the area above our underground plaza. The signal is weak, but making contact shouldn't be a problem."
"Keep trying.