Officially entering the Feicheng Shelter, everyone felt a sense of the passage of history.

As those who experienced it firsthand back in the day, seeing the familiar layout and cold corridors evoked an illusion of dreaming back thousands of years.

But the present before their eyes is modern civilization, while the wasteland above the surface has turned into a land of desolation.

Time seemed to halt here and now, the stark contrast creating a moment of dissonance and disorientation.

Before everyone could react, the sound of whispering filled the ears of the six-person team...

Murmurs and hushed secrets, along with distant howls.

Lin Feng furrowed his brow; the sound did not originate from any external reality, as the quiet underground ruins were as still as death, without a ripple.

Moreover, the whispers vanished without a trace whenever one tried to focus on them.

At this moment, before Lin Feng and the group could speak, Zheng Yan Ying spoke in a low voice from ahead:

"The murmurs you're hearing are psychic contamination remnants from old battlefields, not real sounds."

"They stem from the energy radiation emitted from deep within the ruins, akin to genetic pollution, but affecting the brain's spirit, causing auditory hallucinations."

"As long as you concentrate, their impact on the body is negligible. Only those weak in will are susceptible to its invasion, becoming paranoid and delusional, or even experiencing hallucinations, leaving them mentally exhausted."

With that, Zheng Yan Ying raised a large hammer, his expression growing serious under his helmet:

"Be careful from here on out."

"Originally, the psychic contamination only appeared below the third level, spreading with mutant activity. However, if such murmured hallucinations are now appearing on the first level, it means either mutants have been here recently, or someone has opened the passage doors at the bottom..."

"...allowing the once-sealed and isolated source of heavy contamination to erupt completely, surging like a fountain."

"Have you prepared the teaching emblems? Remember to place them on your chest; they can effectively alleviate the psychic contamination from the murmurs."

The four people behind nodded, realizing that the church badges on their chests were slightly warm. By focusing on them, they could effectively block the murmurs from entering their minds.

As for Zheng Yan Ying and Shen Yue, being cultivators of the Church and having achieved evolution through the genetic gift of the Master of the Holy Spring, they naturally were not afraid of the psychic contamination left by these Tier Three Kings.

Lin Feng took a deep breath, relieved to have the help of the Church Squad this time. Otherwise, facing such eerie shelter ruins, the omnipresent psychic negative influence alone could eliminate a large number of explorers with wavering willpower.

Even an Evolver, immersed long-term in a chaotic environment with hundreds or thousands of voices whispering in the mind, could gradually experience a mental breakdown, driven insane.

No wonder the Taishan Ruins have been classified as a restricted area.

The eerie and terrifying influence there is unbearable to ordinary life forms.

Upon entering the first underground level of the shelter ruins, the restricted area delivered a shock, causing everyone to swallow nervously and follow Zheng Yan Ying, continuing forward.

Lin Feng had the highest Evolution Level here and also possessed the strongest Spirit Attribute, allowing him to perceive the psychic contamination more clearly. He could even vaguely hear deep roars interspersed among the whispers.

Moreover, those roars felt like they were coming closer, reminiscent of ghosts approaching in a horror movie.

Upon sensing this, Lin Feng narrowed his eyes, a notification gradually surfacing in his peripheral vision:

"Detected mild psychic contamination in the host's environment. Consume one Life Value to clear and block it, effect lasting one hour."

"Detected nearby low-level contamination source approaching!"

Lin Feng tightly gripped the rapid fire cannon in his hand, recalling Zheng Yan Ying's earlier introduction, and asked in a low voice:

"If the psychic contamination is spreading, does that mean the mutants once confined to below the third level might now appear above it?"

This question instantly heightened the tension among the group, especially Zheng Yan Ying at the front, who raised his hammer and nodded in agreement:

"Exactly, stay alert!"

"The Feicheng Shelter has ten levels, with two automatic elevators, but both are damaged. Even with repairs, there isn't enough power supply, so reaching lower levels requires using the safe passage stairs."

"The safe stairs on each level stretch from left to right, requiring one to traverse each level's main corridor. It's a ten-kilometer walk to reach the next level's entrance."

"The entrance to level two is five kilometers from the center, so simply keep walking straight."

Due to its isolation and being buried ten meters underground without sunlight, the underground shelter maintained a very low temperature, seven to eight degrees lower than the caves.

Even in this thirty-plus degree environment, the sealed battle armor allowed them to endure for a long time.

Yet the damp and dim setting was hard to adapt to for those accustomed to the wasteland's three-day sunbathing.

Especially after hearing Lin Feng's caution, their eyes widened, pupils dilating in urgency, straining to capture more light from the searchlight-illuminated darkness.

"Ah!?"

At this moment, Chen Shanshan, who was walking at the side, suddenly let out a gasp of shock!

The floodlight on her chest had been surveying a ruined room to her left when a black silhouette suddenly flitted across her vision.

This scene startled her greatly.

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