Qin Tiexin Put out the ground fire and lift the lid of the cauldron.
A strange medicinal fragrance instantly filled the entire refining room, suppressing even the smell of rust and charcoal fire that had accumulated in the stone cracks in the corners for many years. In the cauldron, Marrow Cleansing Liquid was completed, showing a warm color between gold and jade, thick and dense, and fine Spiritual Qi bubbles rising and dissipating on the surface.
He did not rush to the next step, but first sat cross-legged and adjusted his breath for half an hour to adjust his condition to the best.
Then, he took out two large wooden barrels that he had prepared in advance.
These two buckets were custom-made by him at Fangshi a few days ago. One is used to soak the medicinal liquid. It is best to use natural spring water, ice spring is best, and the other holds ordinary spring water for rinsing.
Wind and Snow Pass If nothing else, ice springs are the best thing to find, but according to records, unmelted ice springs near the Eternal Night Sea have the best effect, because the spring water there contains very weak extremely cold Spiritual Qi, which can better guide the medicine to penetrate into the bones.
When he asked Nangong Yao to go on a mission, he brought a bucket back with him. When the senior sister heard that he was going to attack Marrow Replacement, she agreed without saying a word. Three days later, a large bucket of sealed ice springs was delivered, which was bone-chilling and Cold Qi was coming out of the mouth of the bucket.
Qin Tiexin slowly poured the warm Marrow Cleansing Liquid in the cauldron into the first wooden bucket, and then poured it into the bucket of the Eternal Night Sea ice spring. The light golden liquid melted quickly in the ice spring, dyeing the entire bucket of water into a warm color. He first tested the water temperature with his hands - it was bone-chilling, and his fingertips instantly turned white from the cold.
He took off his robe, took a deep breath, raised his legs and stepped into the bucket.
A biting chill instantly enveloped the whole body. The temperature of the ice spring was extremely low. Even though he had Body Tempering Eighth Layer's physical body, he couldn't help but shudder when he entered the water. But the real test was yet to come - the power of Marrow Cleansing Liquid's medicine needed to be guided by the ice spring to slowly penetrate into the bones and enter the bone marrow.
He closed his eyes, calmed his mind, relaxed his body, and let the chill wrap around his body.
During the first half of the time when he burned the incense, he was only cold. The coldness that penetrated his bones slowed down his blood flow, and a layer of fine goose bumps appeared on the surface of his body. He sat steadily in the bucket, adjusted his breathing, and deliberately slowed down and deepened every time he inhaled, so that his body could gradually adapt to the temperature.
Then, the medicine began to penetrate.
At first, there was just a slight warm feeling on the surface of the bone, as if something was sticking to the bone and slowly releasing heat. But soon, the warmth turned into an indescribable feeling - itching.
It's not an itch in the skin, but a strange itch coming from inside the bones and deep in the bone marrow, as if there are countless tiny insects and ants crawling, biting, and squirming in the bone cavity. The itch starts from the bones of the limbs, spreads upward along the spine, and soon spreads to every bone in the body.
Qin Tiexin gritted his teeth and the veins on his forehead popped out.
The itching is more unbearable than the pain.
The pain can be endured by willpower, just gritting your teeth and getting through it. But the itch makes people want to go crazy, the kind of itch that goes deep into the bone marrow, making people want to stretch out their hands to cut the flesh and reach into the bones to scratch. His hands tightly grasped the edge of the bucket, his knuckles turned white, and his nails were almost embedded in the wood grain. Several times, he could hardly control the urge to reach out and grab, and his body involuntarily wanted to twist and struggle, but he held back at the last moment.
Can't be caught.
Once scratched, the skin is damaged, and the blood condenses, the medicinal power will accumulate under the skin. Not only will all the previous efforts be wasted, but the meridians may also be damaged, making this step more painful than expected.
He didn't even dare to bite his lower lip for fear of breaking it, so he could only resist. Cold sweat slid down his forehead and dripped into the bucket, causing tiny ripples on the surface of the liquid.
As the power of the medicine continues to penetrate, the itching feeling gradually deepens. Every time the blood flows through the bones, a layer of the medicine is taken away, and at the same time, new medicine seeps in from the outside, forming a continuous, layer-by-layer torture.
He began to operate Qi and Blood in his body, actively cooperating with the penetration of the medicine. This process was extremely painful, because once it was actively activated, the itching sensation would increase exponentially, but he did not stop. The faster the speed, the better the effect, and the shorter the torture time.
As the liquid medicine continues to be absorbed, the temperature of the water in the barrel begins to change.
The initial biting chill gradually faded away, the Cold Qi in the ice spring was neutralized by the medicine, and the water temperature slowly rose. He noticed that the tiny ice particles in the bucket had completely melted, and vague heat began to emerge from the water. A faint blush appeared on the surface of the skin - that was a sign that Qi and Blood was accelerating after the medicine penetrated into the bones.
One hour.
Two hours.
When the last ray of medicinal power in the barrel was absorbed, Qin Tiexin almost struggled to stand up from the barrel.
The liquid in the barrel had changed from a warm golden jade color to a clear water color - all the medicinal power had penetrated into his body without any wastage. He lowered his head and glanced at his arm. The surface of his skin was covered with a thin layer of gray-black dirt - that was the impurities discharged from the second marrow cleansing, and the condensation of the remaining erysipelas in the body after the medicinal power forced it out.
He stepped out of the bucket and stepped into the bucket of water next to him to wash away the dirt on his body. When the water came into contact with his skin, there was a slight sting - that was a sign that the pores of the skin had not been completely closed and that it was particularly sensitive to external stimuli.
He dried his body, put on a thin shirt, stood in the center of the refining room, and carefully felt the changes in his body.
There was a faint feeling of warmth deep in the bones, as if something was slowly growing and changing. He looked down at his arms, and under the skin, there was a faint, very light golden sheen - that was a sign that the medicine was wrapping the bones, and it was a sign that Marrow Cleansing Liquid was acting on the bone marrow.
But Qin Tiexin knows that this is just the beginning.
Marrow Cleansing Liquid is just an "introducer". Its function is to soften the bone structure, stimulate the bone marrow to enter a plastic state, and inject the medicinal power into the body to create conditions for the real Marrow Replacement.
The process of truly transforming the bone marrow and giving birth to Spirit Marrow has just begun. According to the formula records and the notes left by Body Refining's seniors in the Flowing Cloud Sect, the most effective way to complete Marrow Replacement is to temper by alternating cold and heat.
There is a reason why Wind and Snow Pass has become a place that many Body Refining monks yearn for.
Before he came, he heard Deacon Lin and several logistics colleagues mention that there is a training facility opened by the Ice and Snow Pavilion in the pass, called "Ice and Fire Cave", which is equipped with extremely Frost The chamber and the underground fire chamber are specially used by Body Refining monks to temper their physical bodies. The extreme environment of alternating cold and heat can stimulate Qi and Blood activity to the greatest extent and accelerate the transformation of bones.
Qin Tiexin put on his robe, opened the door and walked into the wind and snow.
It was already dark, but the lights in the pass were still bright. He walked north along the main street for a while and turned into a relatively wide alley. At the end was a building made of blue-black stone. At the door was a plaque made of Profound Frost Crystal, with three words engraved on it:
"Ice and Fire Cave".
He opened the door and walked in.