Slowly advancing in the underground cavern, Xu Xin began to observe the surroundings.
The walls were not stone, but slightly dry soil, which was light red in color. The entire wall was composed of this light red, contaminated soil (gray).
He lightly touched it with his hand, and a small piece of wall crumbled, falling onto the slope and rolling down a bit.
"You guys, don't touch the walls if you don't have to; it's all soil and might collapse." Xu Xin reminded the four beasts.
The underground passage inside this cavern was round above and below. Though the ground was slanted, it was relatively flat, while the ceiling was curved.
The entire cave seemed like it was burrowed by a gigantic worm, tunneling downwards.
"Eek..." Keke lay on Xu Xin's shoulder, huddling its head in some fear.
Its sense of danger was extremely keen, and in its perception, they were moving step by step towards peril.
