Zhou Dazhi learned that the cockroaches had already spread, and he was also worried. The consequences in Wanxiong City hadn't been resolved yet, and if Blue Sea City turned into Wanxiong City, even his abilities in the Air Control Realm wouldn't guarantee his safety.
As for the demonized cockroaches spreading, Lu Yu was at a loss. Even though he could follow the tunnels and locate the cockroaches, exterminating them one by one.
However, his abilities were limited. Not to mention whether the demonized cockroaches would hide upon sensing their numbers dwindling, just searching each tunnel would take an unknowable amount of time, and no one knew the extent of these tunnels.
As far as Lu Yu's sensing range was concerned, the tunnels had already extended beyond this street, at least over ten kilometers long. By the time he checked each one, the cockroaches would have nested multiple times.
