"Thump... thump... thump..."
That eerie heartbeat did not so much travel through the air as strike like a heavy hammer deep within the soul.
With every dull echo, the viscous sewage in the Underground Waterway shook violently.
Qian Renxue only felt a stifling tightness in her chest, as if her heart had been seized by an unseen, icy hand. Every beat became unimaginably difficult.
If not for the tall figure ahead of her holding up a resplendent Starlight Domain and keeping that power of shadow law isolated outside, she had no doubt her heart would have burst apart under this bizarre resonance.
"Keep up. The good show's about to begin."
Han Yuchen's voice was still languid, even carrying a hint of amusement, as if he were watching a play.
His hands were tucked into the pockets of his black trench coat as he strode steadily over the final stone step at the end of the waterway.
After passing through that suffocating pitch-black passage, the view ahead suddenly opened wide.
It was an underground cavern so enormous it left one speechless. The dome rose a hundred meters high, with countless sharp stalactites hanging upside down.
However, what dripped from those stalactites was not clear spring water, but black mucus giving off an intense rotten stench.
The cavern walls were covered in dark purple vines. They were like thick blood vessels, swelling and contracting rhythmically with that eerie "thump, thump," continuously transporting some indescribable Evil Energy toward the center of the cavern.
And at the very center of this vast space stood a massive altar that made one's hair stand on end.
The base of that altar was built entirely from pure Obsidian.
On the surface of the Obsidian, dense and extremely twisted array patterns had been carved with an unknown dark-red