While the player is in Battle Through the Heavens, the system is in The Great Ruler.

Chapter 3: Heading to Qingshan Town to Find Little Fairy Doctor

The next day, the morning mist had not yet dissipated.

A furtive figure emerged from the gate of the Xiao family mansion; it was Lu Yu.

He changed into an inconspicuous gray cloak, which covered most of his face, and held a detailed map of the Gama Empire in his hand.

"According to the original timeline, Little Fairy Doctor is still working as a physician at the Ten Thousand Medicines Hall..."

Lu Yu's lips curled slightly, "The Calamity Poison Body is an excellent candidate for cultivating the Yin Scroll of the Great Floating Pagoda Technique!"

He walked briskly, heading straight for the outskirts of the city.

……

A month later,

Green Mountain Town, near the Monster Mountains.

Shops lined both sides of the bluestone street, their calls echoing throughout. A tall, slender figure, draped in a grey cloak, walked calmly through the bustling crowd.

Suddenly, he stopped in his tracks, his gaze falling on a spacious herbal medicine shop on the street corner—Wan Yao Zhai.

"found it!"

Lu Yu smiled slightly and pushed open the door to enter.

As he stepped into the pharmacy, his gaze swept across the room and he saw a young woman in white standing behind the counter. She was beautiful and delicate, with delicate features, and she was carefully and attentively arranging medicinal herbs.

"What medicinal herbs does this guest require?" Little Fairy Doctor looked up, her voice gentle.

Lu Yu smiled slightly and took out a prescription from his pocket: "Miss, could you please prepare a dose of Qingling Powder for me?"

Little Fairy Doctor took the prescription and examined it carefully. Suddenly, her delicate brows furrowed slightly: "This prescription... is somewhat peculiar. Several of the herbs have conflicting properties. If they are not properly prepared, I'm afraid it might..."

Lu Yu feigned surprise: "Does the young lady know medicine?"

Little Fairy Doctor nodded gently: "I know a little bit."

"Could you please help me adjust it, young lady?" Lu Yu asked with a gentle smile.

After a moment's hesitation, Little Fairy Doctor nodded in agreement. She turned to fetch the medicinal herbs, her slender figure silhouetted against the snow-white robes.

After a while,

"These are the ingredients for the Qingling Powder you requested, a total of five low-grade ingredients, costing five hundred gold coins."

Upon hearing this, Lu Yu's smile deepened. He casually took out a heavy money bag from his storage ring and gently placed it on the counter: "This is a thousand gold coins; the rest is a reward for your guidance, young lady."

Little Fairy Doctor's beautiful eyes widened in surprise, and she quickly waved her hands: "This is too much..."

"Young lady, your medical skills are superb; you're worth the price."

Lu Yu looked at him sincerely and said earnestly, "Besides, I have a special medicinal herb that I would like to ask you about."

Little Fairy Doctor blushed slightly at his praise and lowered her head, saying softly, "You flatter me, sir... May I ask what special medicinal herb it is?"

Lu Yu took out a jade box from his pocket and slowly opened it. Inside the box lay a herb with a deep blue color and fine silver veins on its leaves.

"This is... Ghost Grass?" Little Fairy Doctor's breath hitched, and she subconsciously leaned closer to examine it. "Look at the silver stripes on the leaves... Could it be a variety that's nearly eight hundred years old?"

"Young lady, you have a good eye." Lu Yu nodded approvingly. "This is indeed an eight-hundred-year-old Ghost Grass. I obtained it by chance deep in the Monster Mountain Range. It is said that..."

He deliberately lowered his voice: "This ghost grass is extremely poisonous and has miraculous effects on certain special constitutions."

“Recently, someone has been buying up this medicinal herb in large quantities.”

"What do you say, Fairy Maiden?"

Upon hearing this, the little fairy doctor's fingers, which were arranging medicinal herbs, trembled almost imperceptibly. She forced herself to remain calm and asked, "What else does the guest... know?"

Lu Yu didn't answer immediately, but instead looked meaningfully at the back door of the pharmacy: "It's not convenient to talk here. Why don't we find another place to discuss this in detail?"

Just then, the door of the pharmacy was suddenly pushed open violently!

"Little Fairy Doctor! Our young commander requests your presence!" Three wolf-headed mercenaries swaggered in, the burly man in the lead leering at the girl.

Little Fairy Doctor's face turned deathly pale instantly, and her fingers gripped the hem of her clothes tightly.

A cold glint flashed in Lu Yu's eyes as he turned and stood in front of her, saying, "Gentlemen, please line up to buy medicine."

"Where did this blind brat come from?" The burly man grinned maliciously as he drew his long sword. "How dare you meddle in the affairs of our Wolf Head Mercenary Group?"

Lu Yu sneered, a layer of dark, ethereal qi-infused clothing instantly covering his entire body. A dangerous smile curled at the corner of his lips: "Coincidentally, I'm a busybody." "A Dou Shi?"

Upon seeing this, the burly man at the head of the group's pupils suddenly contracted, then he gave an embarrassed smile, "It's a misunderstanding, all a misunderstanding..."

After a while,

"what!"

With several screams, three figures were thrown out of the Wan Yao Zhai, causing an uproar on the street.

The onlookers looked at each other in disbelief. No one expected that the Wolf Head Mercenary Group, which usually acted arrogantly, would actually run into a brick wall today!

Inside the shop, Little Fairy Doctor stared blankly at Lu Yu, her red lips slightly parted, clearly still reeling from the shock she had just experienced.

"You...you are a Battle Master?" Her voice trembled slightly, her eyes filled with disbelief.

Lu Yu smiled slightly, dispelled his battle aura veil, and said gently, "Now, can we have a proper talk?"

Little Fairy Doctor took a deep breath, steadied herself, then bit her lower lip and whispered, "Who...who are you? Why are you helping me?"

Lu Yu did not answer directly, but took out a jade slip from his pocket and gently placed it on the counter: "The Seven-Colored Poison Manual, a poison manual that records how to concoct poisons. I think you will be interested in it."

Little Fairy Doctor's pupils contracted slightly, and her slender fingers instinctively touched the jade slip, but recoiled as if electrocuted the moment they touched it. She looked at Lu Yu warily: "How did you know I needed this?"

Lu Yu's gaze was deep as he slowly said, "There is a type of physique in this world called the Calamity Poison Physique. It has a thin, seven-colored hidden line on its lower abdomen. It is born with poison and can grow by devouring poisonous substances. However, if there is no way to control it, it will eventually backfire on itself."

"You—!" Little Fairy Doctor's expression changed drastically, and she staggered back two steps, her eyes filled with terror. "How could you know..."

"Don't be nervous." Lu Yu's tone was gentle, yet carried an undeniable firmness. "I am not your enemy. On the contrary, I can help you control this physique, and even... allow you to completely master this power."

Little Fairy Doctor's chest heaved violently. After a long while, she asked in a low voice, "What do you want?"

Lu Yu smiled slightly: "Cooperation."

He lightly tapped his fingertip, and a dark, ethereal battle aura condensed in his palm, transforming into a miniature pagoda phantom: "I need the power of your poisonous body, and you need my control techniques. How about we each get what we need?"

Little Fairy Doctor stared at the mysterious tower shadow, her eyes flashing with struggle. How could a mere Dou Shi be able to release Dou Qi like a Great Dou Shi? What kind of profound technique was this?

Who exactly is this person?
Finally, she slowly raised her head, her voice barely audible: "Why should I believe you?"

"Just try it and you'll know."

Lu Yu suddenly reached out and grabbed Little Fairy Doctor's slender wrist. The girl gasped and instinctively tried to break free, but found that his hand was as firm as an iron clamp.

"What are you doing?!" Her pretty face turned pale, and a hint of panic flashed in her eyes.

"Don't move." Lu Yu's voice was deep as he slowly channeled dark battle qi into her body. "Feel it carefully."

Little Fairy Doctor shuddered, feeling a cool sensation coursing through her meridians. Even more astonishing, the deadly poisons lurking within her body began to gather in an orderly fashion under the guidance of this power!
"This is……"

Her red lips parted slightly as she watched the poison that had raged within her for years being compressed bit by bit, finally condensing into a grayish-purple poison pill in her dantian. Although the poison remained, it would no longer erupt uncontrollably!

"The poison won't flare up again for three months." Lu Yu released his grip, a faint smile playing on his lips. "Now, do you believe me?"

Little Fairy Doctor stared blankly at her palm, her fingertips trembling slightly. For the first time in countless years, she felt so relieved—no longer needing to worry about unintentionally poisoning others, no longer needing to endure the agonizing backlash of toxins alone in the dead of night…

Suddenly, glistening tears welled up in her eyes and rolled down her fair cheeks.

"Why..." she raised her tear-filled eyes, "Why did you help me?"

Lu Yu did not answer, but simply pushed the Seven-Colored Poison Scripture in front of her: "At this time tomorrow, I will be waiting for you at the entrance of the Monster Mountain Range. If you want to completely control the Calamity Poison Body, come with sincerity."

After saying that, he turned and left, leaving Little Fairy Doctor staring blankly at his retreating figure, the jade slip she was clutching tightly in her hand burning hot...

A comparison of the cultivation levels of The Great Ruler and Battle Through the Heavens.

Sensing Realm – Battle Qi Stage
Spiritual Realm – From Fighter to Master
Spirit Wheel Realm – From Great Battle Master to Battle Spirit

Divine Soul Realm (the watershed between lower realms in the Great Thousand Worlds) – Battle King

Fusion Realm - Dou Huang

Transformation Realm - Dou Zong

The Heavenly Realm - Dou Zun

The Supreme Lesser Tribulations – Nine Revolutions of the Battle Venerable

Supreme Realm – Dou Sheng (Eighth-Rank Supremes can create space similar to Dou Shengs, but the Great Thousand World space and lower plane space cannot be generalized.)
Earthly Supreme - Dou Di (Whether Dou Di is equal to Supreme, Earthly Supreme, or Heavenly Supreme has been debated for decades, and every reader has a different opinion. This book adopts the setting from the later stages of The Great Ruler, where Dou Di is equal to Earthly Supreme. Please don't be offended.)


(End of this chapter)