Just as cracks burst across the ground, Zhu Rong leaped backward and landed behind the street.
But as the collapse continued to spread, Zhu Rong and Xiniang's two mechs could only keep retreating.
They withdrew several hundred meters before the two mechs finally stopped.
By then, an irregular gap had appeared in the ancient city.
The street and the ruins of the buildings on the ground all slid into the gap. Looking down through it, all that could be seen below was darkness.
The strata were hollow. Just as the scholar had said, the underground water that had once existed below had dried up. On top of that, the Scorching Wind had blown through the area for years, altering the geology and leaving it fragile.
Looking at the enormous opening in the ground ahead, Bai? stuck out her tongue. "Good grief, we almost fell in."
"Looks like we'll have to be careful anywhere there's a well. The geology in those places has become extremely fragile."
Luo Yan nodded. Just then, he faintly heard a deep, low horn.
The sound seemed to be coming from underground.
Luo Yan remembered the biological gray lights in the Undercity and immediately said, "Be careful. The collapse just now may have attracted the attention of the creatures in the Undercity."
As he spoke, he activated Divine Treasure and looked underground.
Deep beneath the ground, in the city of the Undercity, clusters of biological gray lights were moving rapidly.
The city beneath the ancient city should have had multiple exits. Thus, Luo Yan saw the gray points of light dispersing and orderly surging toward the surface along one flight of stairs after another.
At that moment, several drones arrived above the ancient city. With the perspectives provided by the drones, everyone in the Exploration team could