He Hongchi approached a few stones. He put his hand on the stone and wanted to turn it over to check. As soon as his hand touched the stone, he felt a chill spread into his limbs.

He couldn't help but cry out because of the piercing chill and even a hint of pain.

Wenwen and the others were startled by his sudden exclamation and hurried forward to ask, "Master, what's going on? Master, what happened to you?"

He Hongchi stroked his arm, and when his palm left the stone, the piercing chill disappeared.

He Hongchi said to the two, "There's something strange about these stones."

Upon hearing this, Wenwen reached out to touch the stone. Yu Xunting and He Hongchi reached out to stop her at the same time, "Are you trying to kill yourself? I've already told you that this stone is weird, and you still dare to touch it?" He Hongchi scolded.

Wenwen, who was being scolded, said awkwardly, "I want to see if there's anything strange about it."

He Hongchi glared at her and said, "If it's some deadly poison, would you still be alive if you touched it?"

Seeing her being scolded, Yu Xunting quickly changed the subject, "Doctor He, I feel that the sour smell in the air has become stronger since we got closer to these stones."

He Hongchi nodded and said, "Yes, the smell in the air should be caused by these stones."

Wenwen asked curiously, "Master, what's so strange about this stone?"

He Hongchi touched his arm. If he hadn't felt a piercing chill that spread from his arm to his body, he would have thought he was hallucinating.

"When my hand touched the stone just now, a chill spread throughout my limbs. It wasn't just cold, it felt a little painful as well."

"Master, how could there be such a strange stone? It is colder than ice. Could it be a stone fished out from a thousand-year-old cold pond?" How else can one explain this strange situation?

He Hongchi shook his head. "I don't know what caused it, but one thing is certain, the smell in the air comes from these stones."

Wenwen looked at these stones. At first glance, they looked no different from ordinary stones. How could they be so confusing?

He Hongchi looked at the skeleton beside him and said, "Perhaps someone deliberately soaked these stones in a hallucinogenic potion. Once the stones have absorbed enough of the drug, they will be placed here so that the drug's effects can last for a long time."

Wenwen was amazed. "The effect of this medicine lasts for too long, doesn't it? What kind of medicine can last for hundreds of years without fading? Master, let's scrape some powder from this stone and go back to study it?"

"I'll do it," said Yu Xunting, who was very perceptive. He took out a knife and a piece of oil paper from his backpack and scraped the powder off the stone vigorously. He said, "This stone is very hard, like granite. I can't scrape off much powder."

He Hongchi glanced at the powder he scraped out and said, "A little bit will be enough."

Yu Xunting quietly placed his hand on the cold stone. In an instant, a chill like a venomous snake swiftly penetrated his limbs and bones. The speed was so fast, like lightning streaking through the night sky, catching him off guard.

Yu Xunting felt a piercing chill spreading from his fingertips, instantly spreading throughout his body. The chill seemed to have sharp teeth, biting every inch of his skin, and every cell trembled in pain.

His body trembled involuntarily, and his teeth began to chatter, making a "crackling" sound. This pain was not just a superficial chill, but a stabbing pain deep into his bones, as if countless ice needles were piercing his body at the same time.

He Hongchi, who was standing by, noticed something was wrong with him and immediately waved his hand away from the stone, cursing, "You two are both giving me such a hard time. You told me there was something strange about this stone, yet you still insisted on trying it."

Wenwen saw that his handsome face was pale, his body was shivering, and his teeth were chattering. She helped Yu Xunting sit against the wall and said, "Cousin, how are you? Do you want to drink some water to calm down?"

"Don't let him drink anything now, let him calm down," He Hongchi put his hand on Yu Xunting's pulse and checked his body.

After a long time, Yu Xunting felt the coldness in his body slowly dissipating.

He Hongchi let go of his wrist. He couldn't see anything wrong with his body for the time being, just that he had caught a cold. He took out a pill and asked him to swallow it.

After taking the medicine, Yu Xunting felt much better. He asked, "When I touched the stone just now, did you notice how much time had passed?

Apart from the lightning-fast chill he felt when he first touched it, and the subsequent icy sensation that almost frightened him, he felt that time was passing very slowly, and the coldness in his limbs and bones blocked his senses.

Wenwen was relieved to see that he had recovered and his face had regained color. "It only took you a minute or two. If it weren't for Master's quick reaction, I wouldn't have noticed it."

Yu Xunting told them about the changes in his body after hitting the stone, "In the end, I felt that I had fallen into the abyss of pain. If it weren't for Doctor He slapping my hand away, I don't know what would happen now?

He Hongchi looked at the two of them seriously. "From now on, no matter what happens in this secret room, as long as I don't allow you to move, don't be too curious. This is not an ordinary cave. What if you accidentally lose your life?"

He Hongchi was thankful that he let go as soon as he realized something was wrong. "I let go as soon as I realized something was wrong. Otherwise, the consequences would be disastrous."

Wenwen saw her master staring at her, and she quickly raised her hand to assure him, "Master, don't worry. You said not to let me move, and I will never do anything rash."

Seeing Yu Xunting's miserable state, he, a grown man with such a strong mind, was trembling all over because of the cold stone. She was just a small weak woman, so forget it, just be obedient and don't be too curious.

He Hongchi placed the scraped powder at the bottom of the backpack and said, "You said the books inside might contain clues. Let's quickly read through all of them. Maybe we can get the answers to these questions."

Upon hearing this, Yu Xunting stood up by supporting himself against the wall with his hands. Wenwen hurried forward to help him. She glanced at the wall inadvertently and found that there seemed to be a shallow scratch on the wall where Yu Xunting had leaned.

She wiped the dust off the wall with her hands, and sure enough, there were words carved on the wall. "Master, look, there are words carved on the wall."

Upon hearing this, the two turned around and looked at the wall. Wenwen had already wiped a part of the wall clean, revealing a shallow scratch. They went up to wipe the dust off other parts, and found that the entire wall was engraved with words.

These words were carved very shallowly. After such a long time, dust has covered the words. If you don’t wipe off the dust, you can’t see that there were words carved on the wall.