Inside the empty cavern of Underworld Mountain, a profound, endless aura permeated the air. Entering it felt like falling into the deepest reaches of the universe, with no end in sight. The cavern, which had been shaking moments ago, slowly fell silent. Chen Yun collapsed onto the ground and panted heavily. After the tendency of his physical body to break through had been forcibly suppressed and severed by the Heaven Diagram, that dangerous feeling lingering in his heart finally began to fade.
"I wonder what sort of tribulation the Nirvana Realm requires one to endure. That feeling just now was truly terrifying! Yet it still hasn't descended."
Chen Yun slowly recovered and secretly marveled. That aura of destruction seemed to have come from an extremely distant place in the world. For it to truly descend upon him would probably take quite some time. Only when his physical body successfully transformed into the Nirvana Realm would the tribulation truly arrive and bring him destruction. That destructive aura, carrying the aura of the Great Dao, left Chen Yun extremely uncertain. It gave him the feeling of quietly waiting for death.
The Mountain Giants that had been inside the cavern of Underworld Mountain were already gone, leaving behind endless depth and darkness. The Styx River surged like it existed in another world, utterly out of place amid the cavern's cold silence. Yet the sound of the black river's rushing waters rang truly in Chen Yun's ears. At the same time, he sensed the deathly stillness inside the cavern. Two completely opposite sensations appeared simultaneously, creating an indescribably eerie feeling in his heart.
Since the crisis had been resolved, Chen Yun, though still shaken, quickly calmed down. Earlier, he had used the Heaven Diagram to suppress himself, but he had paid a rather nasty