The Immortal of Plague begins by establishing the root of lung fire.

Song You opened his eyes and saw blackened wooden beams, with a few rays of pale moonlight filtering through the window cracks and falling on the ground.

He lay on a wooden plank bed in the outer courtyard of Pozang Temple, the bedding beneath him rough and damp.

The inner flame in his chest was throbbing very erratically, showing signs of getting out of control. This was a consequence of forcibly introducing spiritual energy earlier.

Song You calmed his mind and cut off his perception of all external energy. He focused all his attention on his lungs, following the guidance of the "Lung Fire Technique," mobilizing the lung qi within his body to envelop and soothe the raging inner flame.

The glucose supplementation provided in the modern hospital played a crucial role, and his abundant physical strength enabled him to complete this delicate procedure.

Half an hour later, the pulsation of the inner flame returned to normal, and the strange feeling of muscles being torn apart and meridians being stretched to burst disappeared, and it finally stabilized.

Song You exhaled a breath of stale air.

He sat up in the darkness and touched the book "Refining Qi into Spirit" in his inner pocket. This thing was a hot potato; he couldn't cultivate it at all.

Recalling the physical changes caused by forcibly drawing spiritual energy into his body, the intense pain of muscle peeling and meridian tearing still made him tremble all over. It was an absolute terror that exceeded the limits of human endurance.

But he figured out a new use for it.

The physical breakdown caused by spiritual energy entering the body will directly trigger a near-death crisis. This crisis is the key to traversing between the two worlds. As long as he actively contacts and senses the spiritual energy in the environment, he can return to the modern society known as the World of Returning Light at any time.

The modern world is a spiritually barren environment. Once that boundary is crossed, the spiritual energy is severed, and the process of physical decay will be interrupted.

There was no immediate danger to his life, and the damaged tissues could repair themselves in a short time. This essentially gave him a safe way to trigger the event. He could obtain medical resources, replenish his nutrition, and deal with problems in that world, thereby nourishing himself and seeking a way to survive in this strange world of cultivation.

The only drawback is that the stay time is too short.

The hypertonic glucose infusion had only been running for a dozen minutes when the visual field collapsed. This indicates that the ability to travel between the two worlds is constrained by certain conditions related to the severity of the injury, and that the individual needs to find a way to prolong the duration of their stay.

The image of Zhang Lihong coughing up large amounts of blood flashed through Song You's mind. The lesions in the lung fire root had spread with the breath. In that spiritless world, this pathological destructive power erupted without any hindrance.

Zhang Lihong's fate is sealed; it's just unknown how bad things will get. We'll see the outcome when we have the chance to go back next time.

He snapped out of his thoughts and turned to look out the window.

The moon's position did not move an inch. From his failure to draw qi into his body, his return to modern society, to his return after receiving glucose, many things happened during this period, but on the time scale of the Soul Treasury Temple, only a quarter of an hour had passed.

There is a huge difference in the flow rate of time, roughly a one to four time difference.

Song You composed himself and focused his attention back on the life-or-death situation before him. The outer elder had given him three days; his immediate priority was to begin cultivating the "Lung Fire Technique."

The first step in the firewood season: start a fire to burn the dirt.

He sat cross-legged, adjusted his breathing, and focused all his senses into his chest. The fist-sized inner flame resided deep within his lungs, pulsating rhythmically with his heartbeat. Previously, Song You had expended a great deal of energy to suppress it, locking it tightly with his lung qi.

Now, he wants to do the opposite.

Song You released his thoughts and withdrew all control over the Dao Root.

The instant the suppression vanished, the inner flame erupted with astonishing heat. Freed from its restraints, this heat source immediately expanded outwards, attempting to devour the surrounding flesh and tissue along the walls of blood vessels and trachea.

The intense heat scorched his chest cavity, and he could feel the burning sensation on the surface of his internal organs.

Song You remained calm and strictly followed the breathing route recorded in "Lung Fire Technique," mobilizing the remaining lung qi in his body to meet the raging internal flames.

Using his lung qi as a guide, he gathered the scattered heat back together and forcibly dragged it back to a specific area of ​​his lungs. This was an extremely delicate and painful process. The inner flame resisted the guidance, constantly impacting the tracheal wall. Song You gritted his teeth, large beads of sweat seeping from his forehead, the sweat sliding down his cheeks and splashing onto the rough bedding.

Heat and lung air engage in a tug-of-war between the alveoli.

The high temperature continuously evaporated the water in his body and damaged his cell structure. Song You could clearly sense that his lungs were undergoing a reconstruction. This required a massive amount of mental and physical energy.

At this moment, an ordinary person's body would rapidly decay due to energy depletion, and would eventually be burned into a dried corpse by the inner flames.

The hypertonic glucose injected into Song You's blood vessels was now taking effect. The blood was continuously transporting the glucose to every part of his body, and the cells were rapidly breaking it down, releasing enormous amounts of energy. This external nutrient was single-handedly sustaining the terrifying energy consumption of the internal flames.

He maintained his guiding posture, focusing intently on controlling the lung qi.

Without the nutritional supplements of modern medicine, this body, long suffering from malnutrition, simply wouldn't survive the depletion caused by the burning of the body. Song You pondered, how exactly did the other immortal seedlings of the Soul Treasury Temple manage to survive this ordeal?

Is it solely due to one's innate physical constitution that one can withstand it, or are they those so-called immortal-grade Dao roots that possess a certain characteristic of nourishing the body?

These questions remain unanswered, and he has devoted all his energy to the compression and ignition of lung air.

The high temperature continued to rise inside the lungs, and the lung air was compressed to the extreme, exhibiting a viscous texture.

A strange sound came from deep within the chest cavity.

A bubble formed from condensed lung qi burst directly under the extreme heat of the inner flame.

The instant the bubble burst, an invisible flame shot out from the breach and adhered to the surface of the lung lobe. This flame was different from the dark red of the inner flame; it was an eerie grayish-white, devoid of warmth, yet exuding a chilling stillness.

The outer flame is ignited.

Song You successfully entered the initial stage of the firewood industry.

The grayish-white outer flame spread across the surface of the lungs, eventually forming a thin film of fire that enveloped the entire lung. The frenzy of the inner flame was completely isolated by this outer flame, and the burning sensation in the chest cavity subsided, transforming into a feeling of fullness and strength.

This power coursed through his body via his bloodstream, cleansing his weary muscles and bones. Song You opened his eyes, clenched his fists, and his knuckles cracked crisply. He still felt weak physically, but the mental weakness vanished, replaced by energy far exceeding that of ordinary people.

The sunlight from outside the window pierced my eyes.

Song You stood up, walked to the window, and pushed open the wooden lattice window. Sunlight poured in, and the withered bamboo grove in the outer courtyard swayed in the wind. He recalled his perception throughout the entire cultivation process and judged the passage of time.

Two days have passed.