Only when seeing the Plague Doctor, did a slight breath of life appear in those deathly silent eyes.
The headquarters of the Plague Doctor was an underground building, with the ruins of a military camp above it, and the lower part completely hollowed out. A steel giant gate opened, and the magic waves and some special fluctuations flowed within.
Not far inside was another metal giant gate, its surface was still filled with all kinds of extraordinary auras.
After passing through more than a dozen metal gates, they finally entered a spacious place, which seemed to be an underground city, with many buildings inside.
The special substances in the air almost disappeared after entering the underground city, as if there were filters on those giant gates that could filter the pollution in the air.
