As the group drew nearer, the hollow ring at the center of the stone kept enlarging within their Divine Sense, until it was roughly the size of an adult human head.
The four had repeatedly probed the way here with their Divine Sense long ago and had found nothing unusual. At the same time, there were no spiritual energy fluctuations whatsoever coming from the hollow ring that gleamed with white light.
If not for its somewhat unusual shape, it was actually not much different from the strange glowing objects they had seen underground.
It was easy to mistake it for a mineral like a luminous pearl. Such stones, devoid of spiritual energy, were priceless treasures to mortals, but to cultivators, they were utterly worthless.
"Is it really here? There isn't even the slightest restrictive spell fluctuation, and Divine Sense passes straight through the stone. We can easily see the other side. It looks exactly like an ordinary rock!"
The group stood like phantoms within the massive boulder, staring at the hollow ring ahead. Fang Xianhu was the first to speak, his voice already tinged with doubt.
His tone was full of puzzlement. His Divine Sense could clearly see the interior of this stone; there was not the slightest obstruction from any restrictive spell.
"The map only marks this symbol and says it is the entrance and exit. We'll know once we try."
Yin Kongjin had kept his gaze fixed ahead as he spoke calmly.
As he spoke, he slightly raised one hand. Inside his broad sleeve, his thumb and middle finger formed a ring, then he flicked a finger forward.
Two thin strands of spiritual power immediately pierced through the stone wall ahead, striking the glowing white ring and the pitch-black area at its center.
Yet nothing happened. He had