"Underground... civilization?"
Roland could not help but think of the turnoffs on the North Slope Mine and the cluster of grottos running through the Impassable Mountain Range... In his memory, no geological movement could create such unique landforms. At first, he thought that they were created by some sort of mutant hybrid demonic beasts. But according to what Pasha said, maybe they were traces left by the underground civilization?
"At that time, people didn't realize it, nor did they intend to communicate with it. Our forms were so different that we even considered them as a new type of demon, which was why there was a huge deviation on the recorded history. It wasn't until the final phase of the second Battle of Divine Will that there was a breakthrough discovery." Pasha's voice was low and deep. "By then, Taquila was the only city left of the three holy cities. The Union had reached a vital moment of survival or extinction."