Larvitar dug at an astonishing speed, its short claws whipping into afterimages as hard rock crumbled before it like soft mud.
In the blink of an eye, a neat tunnel slanting downward, roughly two meters in diameter, had already extended dozens of meters deep.
Lin Xia and Lou Gao followed close behind, holding torches in one hand for light while tightly gripping their firearms in the other—the weight of the Shotgun gave Lin Xia a slight sense of security.
Lou Gao steadily held his beloved AK Assault Rifle, his finger resting loosely on the trigger as his sharp gaze swept over the darkness ahead and the rock walls being continuously excavated on both sides.
The torchlight flickered, stretching and twisting the shadows of the teacher, student, and Larvitar across the uneven tunnel walls.
The sound of wind came through the passage behind them. It was the Ground Windmill System continuously pumping in fresh air, ensuring they could breathe deep underground.
Time passed second by second as the tunnel continued to extend, its depth having long exceeded a hundred meters.
Yet the surrounding rock walls remained that same deep, heavy Black Rock Layer. Aside from the fresh exposed surfaces turned over by Larvitar, there was no sign of any Mineral Ore, much less the rare Ore Vein they had imagined.
The doubts in Lin Xia's heart grew heavier.
Lin Xia stopped and examined the smooth Black Rock Wall beside him in the torchlight. His fingers brushed over the cold, hard stone surface as he could not help asking in a low voice:
"Teacher, are you really sure there's ore down here? We're already more than a hundred meters deep, yet all we've seen is black rock after black rock. Based on what you said before, if there really were rich deposits,