Treat both symptoms and root cause

  Yu Feng Cheng looked at Fang Yun with a puzzled expression: "What is treating the symptoms and what is treating the root cause?"

  "Treating the symptoms means I can directly drive out the evil spirit from Old Master's body, but the lost vitality cannot be recovered. With Old Master's current physical condition, he won't live for more than ten years," said Fang Yun.

  "What about Na Zhen?" Yu Feng Cheng would naturally not be willing to do so.

  "Treating the root of the problem means finding the demon and killing it before it escapes from Lao Ye's body. Although his vitality won't be fully restored, he can still recover more than half of it, and live for another ten or twenty years," said Fang Yun.

  "Of course it's treating the root cause. What conditions do you have? Just say it, as long as I can do it, I absolutely won't refuse." Yu Feng Cheng hurriedly said.

  "I think you've misunderstood, treating the symptoms and treating the root cause are both easy for me, but treating the root cause has some risks. If the demon loses control, it won't just be the old man who's affected, the entire mansion will be impacted. In comparison, treating the symptoms is faster and safer." Fang Yun said.

  "...How confident are you?" Yu Feng Cheng asked.

  "I'm not sure what this demon's strength is like, and he absorbed most of the old man's life force, so his strength will increase somewhat. I'm not certain if I can handle him."

  Fang Yun's method was naturally to use his divine thoughts to secretly enter the old man's body and fight against the demon.

  If it were his previous life, he would naturally not be afraid. However, at present, his cultivation is less than one ten-thousandth of what it was in its heyday, and the number of divine thoughts he can control is also extremely small. To use divine thoughts to deal with yin objects, there may not be a full guarantee.

  As a doctor, it's about people's lives, even if he can't easily say that he has ten fingers, if it was ten days ago, his grasp would be even greater, but in order to treat Bao Er's illness and draw the array method, he consumed a large amount of immortal energy, and until now he hasn't fully recovered.

  Yu Feng Cheng couldn't help but sink into deep thought, and even he couldn't make a decision. One option could guarantee his father's life, but only for a few more years, while the other would come with enormous risk.

  "Master Fang, what do you think we should do?" Yu Feng City could only seek help from Fang Yun, he was already at his wit's end, now whatever Fang Yun said, went.

  "This is a difficult decision for me to make, I am just a doctor, not the patient's family member. If you choose the former, I will drive out the demon, if you choose the latter, I will take a risk and try it for you." Fang Yun said calmly.

  It's just like in the past when some surgeries required a family member's signature before proceeding.

  What kind of choice Fang Yun can't make a decision and won't make a decision.

  "Master Fang, I really can't make up my mind." Yu Fengcheng's face was gloomy, he had never made such a difficult decision in his life, even ten years ago when the airport spent heavily to expand, he wasn't so torn.

  Yu Feng Cheng's mind was in a state of confusion, and at this moment he didn't doubt whether Fang Yun could cure his father or not, but rather what method she would use, which made him unable to choose.

  Fang Yun gazed at Yu Feng Cheng and said: "I see your magic level, it seems not low."

  "In the lower five levels of the fifth rank, I don't know if there's any connection between this and my father's illness?" Yu Feng Cheng couldn't help but ask doubtfully.

  "Your father is only a fifth-grade first-rank official, but you can be a fifth-grade fifth-rank official, which is not bad." Fang Yun nodded and said.

  "Master Fang is overpraising." Yu Fengcheng didn't know what Fang Yun meant and could only force a smile.

  Fang Yun's eyes flickered as he looked at Yu Feng City: "City Lord, can you believe me?"

  "I didn't believe it before, but now I do." Yu Fengcheng said frankly.

  "So you dare to take a risk?" Fang Yun asked.

  "As long as it can make my father recover, even if it's a mountain of knives and a sea of fire, I won't hesitate." Yu Fengcheng said resolutely.

  "It's not as if it's a matter of life and death, but there is some danger involved. If you fail, not only will your father's life be in jeopardy, but your own magical cultivation will also suffer greatly." Fang Yun said.

  Yu Feng Cheng's eyebrows didn't wrinkle at all: "If Young Master Fang has something to say, then just say it directly."

  "I'll use a secret method to extract your soul and enter Old Master's body together with you, driving out the evil spirit." Fang Yun looked at Yu Feng seriously, and if there was even a hint of hesitation in his eyes, he would give up on this idea.

  "Soul escaped?" Yu Feng Cheng was greatly surprised: "It's said that humans have souls, but they've never been seen before. Could this be real?"

  "That demon is the vengeful spirit of the dead, attached to your father's body, driving him mad and then devouring his life force. Now that I've temporarily suppressed it, we can either expel it or destroy it within his body," said Fang Yun.

  "Alright, since Young Master Fang has gone this far, as his son, I naturally cannot stand idly by." Yu Feng Cheng looked at Fang Yun with determination.

  "It's worth it for your old man to have a son like you." Fang Yun said with a smile.

  "What's next?" Yu Feng Cheng asked.

  "First prepare properly, virgin's blood and young boy's urine."

  "Ah?" Yu Feng Cheng didn't react in time, he had never heard of anyone using virgin blood or children's urine before, or rather, this world simply didn't have such a concept.

  "It's easy to deal with this kid's urine." Fang Yun smiled and said: "But the virgin's blood is a bit more troublesome."

  "What's wrong?" Yu Feng Cheng asked inexplicably.

  There are many girls with yellow flowers in the airport, is there still any particularity about this virgin blood?

  "This naturally requires at least a vat of this size of virgin blood." Fang Yun gestured, roughly 1000 milliliters or so, which is not something a girl can provide.

  "I'll think of a way to deal with this virgin's blood."

  "Be extremely careful when selecting girls, if one of them is not a girl, the consequences will be very serious." Fang Yun reminded.

  "I know, I will choose girls under ten years old," said Yu Feng Cheng cautiously.

  "Don't let each girl donate too much blood, it's not good for the body, but a small amount is fine. You'll probably need to find thirty girls." Fang Yun said again.

  If it's a normal adult, generally taking 200-300ml is no big deal. However, for girls under the age of ten, it's naturally not possible to take that much, as it will have an impact on both their physical health and future development.

  "I know." Yu Feng Cheng nodded and said: "When will you start treating the illness?"

  "Tomorrow at noon," said Fang Yun.

  Lai Fu has been waiting outside the house for more than half a day, to know that in the past, no matter how famous doctors and diviners were, they would not stay inside the house for more than half an hour.

  The old man went crazy and no one could stop him. However, after Fang Yun entered the house, it became much quieter inside, and the old man's craziness was nowhere to be seen.

  Finally, Fang Yun and Yu Feng Cheng walked out of the house, both with different expressions on their faces. Fang Yun was as relaxed as before, while Yu Feng Cheng looked pensive, her emotions unreadable.

  Lai Fu stepped forward: "Master, how is Madam's illness?"

  "Lai Fu, go to the treasury and take 300 taels of silver, then find thirty girls under the age of ten," said Yu Feng Cheng.

  "Ah?" Lai Fu stared at Yu Feng City in confusion, completely unable to understand the meaning of Yu Feng City. He even thought it was Fang Yun who wanted it.

  "Fang Yun said: 'Tell each girl to draw a little blood from them, and give each of them ten taels of silver.'"

  "How is Old Master's condition?" Lai Fu asked with concern.

  Yu Feng Cheng looked at Lai Fu, and words reached his lips but he swallowed them back. He didn't know how to explain things to Lai Fu either.