As soon as she arrived at the door, Mu Hanyan felt that a strong and clear power of heaven and earth was forming a cyclone, slowly flowing around the quiet room, making people feel refreshed and light all over.

Apparently, there was a formation beneath this quiet room, capable of gathering the power of heaven and earth. The Mu family in Anyun Capital also had a similar quiet room for cultivation, but compared to the Danling Hall, it was far inferior in both richness and purity.

As expected of a family of miraculous doctors, their foundation is no less than that of the major families. After seeing the Dan Ling Hall, Mu Hanyan gained a little more confidence in Yan Zishu, and the old men also showed fascination.

"Let me see the strength of your poison first." Yan Zishu asked Mu Hanyan and others to sit down, then he reached out and took Zirong's pulse.

Gradually, Yan Zishu frowned, showing an expression of extreme shock, and then withdrew his hand, but his expression was solemn and he was speechless for a long time.

Everyone around them looked grim, and Mu Hanyan felt a sense of unease.

"Senior Yan, can this poison be cured? I think with your medical skills, there shouldn't be any problem..." Mu Hanyan asked nervously, her heart was in turmoil. The rest of her words seemed more like self-consolation, and she couldn't continue talking.

If the Thousand Poisons Poison takes effect completely, Zirong can only live for a few hours at most. All her hopes are placed on Yan Zishu. If he can't do anything, there are probably few people in this world who can save Zirong. Even if there is, where can she find someone in a short time?

"Alas..." Yan Zishu sighed and said, "Originally, even if I couldn't cure this poison, I could at least find a way to suppress it again. But I didn't expect that he would actually open more than a dozen hidden veins. For ordinary cultivators who haven't reached the Saint level, opening a hidden vein is a great opportunity. He actually opened more than a dozen hidden veins..."

"What do you want to say?" Yan Zishu sighed with emotion, but was interrupted impatiently by Ling Baobao.

Although he had not spent as much time with Zirong as Huayue and the others, he was straightforward by nature and attached great importance to friendship, so his worries were no less than those of others.

"He has opened more than a dozen hidden meridians. I'm afraid my detoxification method cannot be used on him. I'm afraid I can't do anything about this poison." Yan Zishu returned to the topic and said with a sigh.

"You are powerless, you are powerless and yet you ask us to help you? You are powerless and yet you act like you are so powerful? Do you think we are easy to bully, old man?" Ling Baobao cursed loudly, rolled up his sleeves and prepared to fight to the death, completely forgetting that his current strength is only the seventh level of swordsman, and he is definitely not much stronger than an ant in front of the Sword Saint.

"I didn't expect that he actually opened more than a dozen hidden meridians." Yan Zishu was not angry with him, but said with a look of shame and arrogance.

Logically speaking, he should have examined Zirong first and then made his request, but at that time he was only concerned with making things difficult for Mu Hanyan and others, and he was too confident in his medical skills and did not think of this at all. He could only accept the scolding.

Mu Hanyan pulled Ling Baobao to stop him from cursing. In fact, she was also a little angry when she heard Yan Zishu's reply, but she knew that even if she killed Yan Zishu now, it would be useless, not to mention that they couldn't kill anyone else.

"Senior Yan, is there really no way?" Mu Hanyan asked.

Seeing that Mu Hanyan could remain calm in this situation and did not curse like Ling Baobao, Yan Zishu admired her and felt a little more ashamed.

"There is a way, but it's too dangerous. I'm afraid I can't save him and end up killing him instead." Yan Zishu said hesitantly.

"Senior Yan, if you can't save me, does anyone else need to harm my life?" Mu Hanyan frowned after hearing his words, but before she could say anything, Zirong smiled freely.

"Senior Yan, what's the solution?" Mu Hanyan asked. Zirong's words made sense. If Yan Zishu couldn't cure the poison in him, he wouldn't live for more than a few hours, so why worry about his life?

"The solution is very simple, which is to fight poison with poison." Yan Zishu said.

"Fight poison with poison!" Mu Hanyan's eyes lit up. She had never thought of this.

"I wonder if Miss Mu has ever heard of the Rebirth Soul-Breaking Pill?" Yan Zishu asked.

Mu Hanyan took a breath of cold air. This was the Rebirth Soul-Breaking Pill, a poisonous pill that was said to be several times more toxic than the Ten Thousand Ants Heart-Eating Pill!

The Ten Thousand Ants Heart-Eating Pill was classified as a forbidden pill not because of its exceptional strength. In fact, even Fen Qianji, who hadn't yet reached the level of a Sword Master, could withstand it for a moment, let alone a Sword Saint. The toxicity of the pill wasn't particularly strong. It was designated a forbidden pill because of its strange toxicity, capable of driving a person insane and causing them to slaughter their loved ones and friends, even tearing off their own flesh and blood before dying, a horrific sight.

The toxicity of the Rebirth Soul-Severing Pill was much simpler. It could be described in two words: Overbearing! Once poisoned, one's life force would be extinguished and their soul would be shattered. There would be no chance of going mad, and even masters at the Sword Saint level would rarely be exempt.

Although the toxicity of the Soul-Breaking Pill is so strong, it is not listed as a forbidden pill. There is only one reason for this: this pill is too difficult to refine. Both the precious materials and the low success rate are even worse than the Dragon Blood Resurrection Pill. Moreover, the risk during refining is extremely high. Once failed, the alchemist is likely to die from the poison in the pill.

Therefore, there is no need for countries to ban it. For alchemists, this pill itself is a forbidden pill.

"Miss Mu, if you want to dissolve the Thousand Poisons Corroding Meridians Powder in Zirong's body, only the Rebirth and Soul-Severing Pill can do it. But the danger is too great. Unless he can immediately use his internal energy to refine the remaining poison of the Rebirth and Soul-Severing Pill the moment the Thousand Poisons Corroding Meridians Powder loses its toxicity, he will surely die." Yan Zishu continued.

Looking at Mu Hanyan's expression, he knew that she understood the power of the Rebirth Soul-Breaking Pill, so he didn't explain it in detail.

Mu Hanyan did not respond, but turned her gaze to Zirong. This was a matter concerning his life and death, so how could Mu Hanyan make the decision on her own?

Zirong looked at Mu Hanyan and nodded heavily, his expression still as calm and carefree as ever. Although it was a bit dangerous, there was still hope of survival. For him, this was already the best choice.

"Senior Yan, let's use this method." Mu Hanyan said.

"Okay, you guys leave first. I'll start refining the Soul-Breaking Pill." Yan Zishu said.

"What?"

"Mr. Yan, please don't be reckless. Can you refine the Soul-Severing Pill just by saying so?"

"Why don't you think about it again and think of other ways." The old men were all stunned, and then tried to persuade him.

Mu Hanyan was also surprised. She thought Yan Zishu had the ready-made Rebirth and Soul-Breaking Pill on hand, but she didn't expect that he wanted to refine it on the spot.

You should know that the reason the Soul-Severing Pill wasn't listed as a forbidden elixir was because it was too difficult and dangerous to refine. If it failed, the alchemist's life would most likely be in danger. It could be said that the risks he faced in refining this pill were no less dangerous than the risks Zirong faced in taking it.