"Is that the Heaven-Measuring Ruler?" Mu Yuyi murmured softly.
After becoming a Yin-Yang Master, he had developed an uncanny intuition toward the things around him. Many times, he did not need rigorous logical deduction; certain thoughts would simply suddenly appear in his mind, as though aided by the heavens.
Mu Yuyi's heartbeat quickened slightly. The immortal artifact he had plotted for so long was about to truly appear before him. Even with his temperament, he found it difficult to suppress the excitement in his heart.
Whoosh!
Mu Yuyi leaped forward and entered the tunnel leading underground. Since he had already confirmed there was no danger, there was naturally no reason for him to hesitate.
The tunnel was deep and secluded, roughly over two hundred meters long, and it was unknown where it led.
Mu Yuyi moved quickly. After three breaths, he had reached the bottom of the tunnel. A layer of black mist filled the air here, making it difficult to see the surrounding area clearly.
"Heavenly Mystery Pearl!"
Mu Yuyi grabbed with his right hand, and a black pearl immediately appeared in his palm. As spiritual power flowed into it, the surrounding black mist instantly gathered toward the Heavenly Mystery Pearl, gradually making the entire space clearer.
However, when Mu Yuyi clearly saw his surroundings, he was immediately startled.
"Holy shit..." Mu Yuyi could not help swearing. His body retreated several steps in succession, returning to the entrance of the tunnel.
He had finally seen what stood before him. It was an enormous upright obsidian coffin, fifty meters tall and more than ten meters wide. Its surface bore a carved relief of a human figure, whose hands were folded over his chest. His face was covered by a mask filled with intricate patterns, and his eyes were tightly shut.