Dugu Yan was in the same situation. Her martial soul was merely an ordinary Jade Phosphorous Serpent.
Her poison was hidden in her bloodline, deeply embedded in her bones.
In terms from his previous life, it was hidden within her genes.
"The original work recorded that Dugu Bo's Jade Phosphorous Serpent Emperor martial soul evolved after birth. That was probably when the genes in his body became contaminated and mutated."
"The poison attribute has been passed down through the generations. His son was already poisoned to death, and now it's Dugu Yan's turn."
Lu Feng withdrew his right hand, and his expression gradually returned to normal.
"Tang Si, how is Sister Yan's condition?" Ye Lingling asked worriedly.
Just now, Tang Si's expression had suddenly turned cold. At that moment, Ye Lingling's heart had trembled as well.
Ye Lingling had seen that expression on Tang Si's face before—on her grandfather's face. That time, her grandfather had diagnosed a patient with a terminal illness.
At that moment, Dugu Yan opened her eyes. She had felt dazed just now, almost as if she were about to fall asleep.
"Lingling, what's wrong?" Dugu Yan rubbed her eyes and asked in confusion.
Ye Lingling smiled without answering, but her smile looked more like crying.
Seeing Ye Lingling forcing a smile, Dugu Yan immediately felt a bad premonition rise in her heart.
She turned toward Lu Feng. "Tang Si, is there something wrong with my body?"
"Miss Dugu, let me ask you this. Whenever it is overcast or rainy, do you feel numbness and itching around both sides of your ribs, and does it gradually intensify?" Lu Feng asked solemnly.
"And when you have your monthly period, do you feel a slight pain in your lower abdomen?"
"H-how did you know?" Unable to suppress her shock, Dugu Yan blurted it out.
As soon as the words left her mouth, a flush spread across her face.
Tang Si's description was practically as if he had seen it with his own eyes. This could be called Dugu Yan's greatest secret.
Dugu Yan had once sought treatment from Ye Lingling, but Ye Lingling had not found the root of the problem. In the end, she had only told her to drink more hot water.
How could Tang Si diagnose something so private?
"Looks like it was just as I expected." Lu Feng spoke heavily. "Miss Dugu, you're sick!"
"Huh?" Dugu Yan froze, then froze again.
Although he was treating her body, she somehow felt that Tang Si was insulting her.
"Your Jade Phosphorous Serpent Poison does not merely exist within your martial soul. More of it is hidden in your bloodline. If I'm not mistaken, your pair of green eyes should be innate, right?"
"What's wrong with that?" Dugu Yan asked doubtfully. "That soul master with the White Tiger Martial Soul today had two different eye colors too."
"It's different." Lu Feng shook his head and explained, "As everyone knows, after Spirit Awakening, besides gaining their martial souls, the physical structures of certain special soul masters may also change."
"For example, their pupils. This is especially common among soul masters of the Star Luo Dai Family and the Zhu Family. Some people may even retain their martial soul's tail, ears, fur, and so on."
"Oh, really? How come I didn't know that?" Osler scratched his head, feeling his scalp itch.
Lu Feng looked at Osler's face full of question marks, took a deep breath, then slowly exhaled.
Seeing this, Osler immediately straightened up, placed both hands on his thighs, and stared straight ahead.
"When Brother Osler has nothing to do, he can consider reading some books."
Lu Feng turned to Dugu Yan and said seriously, "Miss Dugu, your poison is hereditary. Your parents, and even Senior Dugu, are likely already deeply poisoned."
Dugu Yan frowned at this, her expression shifting uncertainly as though she had recalled some unpleasant memories.
For This Terminal Illness, I Only Have Twelve Treatment Methods
Dugu Yan had never seen her parents since childhood. For more than ten years, her grandfather had been the one to raise her.
When she was little, Dugu Yan had asked her grandfather where her parents had gone. But every time, her grandfather would remain silent, his face filled with regret.
Later, her grandfather told her that her father and mother had been killed by soul beasts.
If Tang Si wasn't lying, then there may have been another reason behind my parents' deaths.
"Wait!" Dugu Yan's pupils constricted as she suddenly thought of something. She asked anxiously, "You said my grandfather is poisoned too? How is that possible?"
"Yeah, Senior Dugu is a Title Douluo. Brother Tang, if you spread rumors about that old man, your ass will get beaten into blossoms," Osler said seriously, picking up where Dugu Yan left off.
"My guess came precisely from Senior Dugu. Osler, let me ask you: before Senior Dugu advanced to Title Douluo, did he have any reputation in the soul master world?" Lu Feng asked calmly.
Osler crossed his arms and said righteously, "How would I know? I wasn't even born then."
Lu Feng shot him a sidelong glance, took a deep breath, and slowly let it out.
Osler immediately sat up straight, put his hands on his thighs, and looked forward.
After thinking for a while, Ye Lingling said, "I once heard my grandfather say that Senior Dugu was a genius who rose to prominence out of nowhere."
"The sect masters of the Lower Four Sects from his era, as well as Senior Dragon Duke of the Beast Sect, were all famous figures at the time."
"But not a single one of them managed to break through to Title Douluo."
After saying that, Ye Lingling asked in confusion, "But Tang Si, what does that have to do with Sister Yan's serpent poison?"
Dugu Yan also stared intently at Lu Feng, eager to know the answer.
After what had happened during the day, Dugu Yan had complete faith in Lu Feng's medical skills.
Her grandfather was her only family in this world. If anything happened to him, Dugu Yan truly did not know what she would do.
"Senior Dugu's martial soul is the Jade Phosphorous Serpent Emperor. I suspect it was a mutation that occurred after birth, perhaps because he obtained some kind of fortuitous opportunity. However, while his martial soul evolved, a poison attribute also mutated within his body."
Lu Feng enunciated every word. "This poison hides within the bloodline and is passed down from generation to generation. Miss Dugu's poison is particularly severe. If it cannot be completely cured, I'm afraid she won't live past thirty."
"What?!" Two cries of alarm rang out at once.
"Brother Tang Si, you're not joking, are you?" Osler asked in a deep voice, his expression serious.
Although Dugu Yan had often teased him when they were children, there was no doubting their relationship.
Ye Lingling also tightened her grip on Dugu Yan's hand, as if trying to offer her some comfort.
Dugu Yan was somewhat flustered as well, but she took a deep breath and said, "Tang Si, everything you've said is only your speculation."
"I'm not denying you, but what you've said is too unbelievable. I need to return and confirm it with my grandfather." Dugu Yan spoke in a low voice.
Lu Feng nodded. "That's fine. When the time comes, have Senior Dugu come find me."
At that moment, Osler asked, "Brother Tang Si, since you've diagnosed Sister Yan's poison, do you have any way to solve it?"
Lu Feng glanced at Osler. That was a good question. The kid had finally done something useful.
"Cough."
Lu Feng cleared his throat.
"The poison in Miss Dugu's body cannot be completely eradicated even by Senior Poison Douluo. Calling it a terminal illness would not be an exaggeration."
At those words, everyone's hearts immediately clenched.
Osler could not help lowering his head and sighing. Dugu Yan had grown up alongside him. For this girl who was only half a month older than him, Osler had always treated her like his "real mother."
Lu Feng shook his head and sighed. "For this kind of terminal illness, I've only come up with twelve solutions for the time being."
"What?! Even you don't have a solution, Brother Tang Si?"
"Ah, my poor Sister Yan." Osler sighed again.
"Huh?!! Wait, what did you just say?" Osler suddenly came to his senses, his eyes widening.
"Twelve kinds!!!"
Smack! Dugu Yan slapped Osler on the head and snapped, "Shut up!"
"Ha-yi!" Osler kept a straight face and sat upright.
"Tang Si, what are your methods? If you can solve the serpent poison in my grandfather and me, ask for any condition you want, as long as I have it!" Dugu Yan declared righteously, patting her chest.
"Hahaha, if I said, 'We're all friends, so I'll do it for free,' Miss Dugu would surely think I was being hypocritical. Since you've put it that way, then I won't stand on ceremony." Lu Feng laughed heartily.
Dugu Yan felt somewhat more at ease instead.
Seeing Tang Si so confident, perhaps he really did have a solution.
"The first is both the simplest and most difficult method. Miss Dugu can absorb a soul bone and use it as a container for the poison," Lu Feng said loudly.
"A soul bone?" Several confused voices sounded at once.
Lu Feng explained, "As everyone knows, soul bones are known as 'treasures of the blood river' and greatly enhance a soul master's physical constitution. Miss Dugu can force the poison generated in her body into the soul bone, thereby reducing the burden on her body."
"However, the poison in your body is produced endlessly. I estimate that the soul bone absolutely cannot be less than sixty thousand years old. Moreover, this method only treats the symptoms, not the root cause. Your descendants would still need additional soul bones prepared for them."
"Sixty thousand years?" Osler said gravely.
"I do have connections for soul bones below twenty thousand years, though they're a bit expensive. But sixty thousand years..."
A soul bone of that age could already serve as a sect inheritance. Ordinary soul masters would never sell one.
"The second method is to find a legendary Immortal Herb and use it to cleanse your meridians and marrow. Not only would the serpent poison in your body be completely removed, but your martial soul might even evolve after birth like Senior Poison Douluo's."
"Immortal Herb? What kind of thing is that?" Osler asked doubtfully.
Lu Feng said unhurriedly, "Such a thing belongs only in heaven; how many times can it be heard of in the mortal world? There is one Immortal Herb that everyone should have heard of: the Singular Velvet Sky Chrysanthemum."
Osler scratched his head. Lu Feng's words had once again entered one of his blind spots.
"Are you talking about Senior Chrysanthemum Douluo of Spirit Hall?" Ye Lingling asked uncertainly.
"Exactly. Senior Chrysanthemum Douluo's martial soul."
Lu Feng explained, "Senior Chrysanthemum Douluo's martial soul truly exists in reality. It is a neutral immortal-grade medicinal herb. Consuming it sends qi through the limbs and blood through the eight meridians, allowing one to cultivate an Indestructible Vajra Body."
"Indestructible Vajra Body!" Osler's eyes immediately lit up.
Smack!
Dugu Yan slapped Osler on the head again.
"Wuwuwu~" Osler immediately covered his head and pretended to cry in pain.
Watching Osler clown around, Lu Feng shook his head helplessly.
Being a carefree rich young master was nice.
Lu Feng had also thought long and hard before revealing information about the Singular Velvet Sky Chrysanthemum.
In the original work, Dugu Bo and Yue Guan had known each other for decades and fought many times. They could be considered both enemies and friends.
Dugu Bo might not recognize the other Immortal Herbs, but there was no reason he would fail to recognize this one.
After dealing with Dugu Yan, Lu Feng had considered countless times how to deal with Dugu Bo.
As a Douluo whose title was "Poison," Lu Feng truly could not believe that Dugu Bo would be an idiot like in the original work.
Therefore, he would first show Dugu Bo something real.
He would proceed step by step and work toward it slowly.
Lu Feng believed that the Ice and Fire Yin Yang Well, Dugu Bo, Dugu Yan, and even her family's dog would not escape from his grasp.
Ninety-Eight Percent Settled
"The twelfth method is also the one I recommend the most."
Lu Feng kept them in suspense before saying, "Have you heard of the Long Necked Five Colored Deer soul beast?"
"I have, I have!" Osler shouted.
"This kind of soul beast lives in the southern grasslands and grows up eating leaves. Their legs and necks are very long. Even hundred-year soul beasts can stand twenty or thirty meters tall."
Lu Feng nodded. "That's right. On the southern Star Luo Grassland, trees are relatively scarce. Only giraffes tall enough can eat the tender leaves at the treetops. After millions of years of evolution, giraffes have grown taller and taller."
"I know all that too, but what does it have to do with my serpent poison?" Dugu Yan asked curiously.
After their conversation, she was once again completely impressed by Lu Feng.
The methods Lu Feng had listed sounded wildly fantastical, but upon careful consideration, every one of them made sense.
It was just that some of them sounded a little improper.
His seventh method was to use his Light Attribute Soul Power to nourish her meridians.
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