The fire gate was opened, and a fierce flame burst out from the ground with a loud whoosh, enveloping the entire alchemy furnace.

  "It's indeed a 4th-level alchemy room, what a dense flame!"

  Liu Wuxie said quietly, no wonder the third-level alchemy room couldn't refine fourth-grade elixirs, all of this has an inseparable connection with the flames.

  The higher the level of Dan medicine, the more stringent the requirements for flames are. Liu Wuxie has not awakened the fire element and can only rely on the earth's core flame to refine it.

  No rush to refine the Four Product Pill, start with the Yuan Yang Dan first, get familiar with the technique, let the pill furnace preheat, then refine the Lian Gu Dan.

  Time passed minute by minute, Yuan Yang Dan was familiar with the road, and in a short hour, he refined four or five furnaces. The ground was filled with porcelain bottles, each containing thousands of grains of Yuan Yang Dan.

  At this moment, the Imperial Academy is busy with New Year's gatherings. Whether it's Tianzi Number or Xuanzi Number, Dizi Number, all students have been on holiday and can move around freely.

  Every year's gathering is very grand, all students must participate, and some instructors will also appear to communicate the learning results of this year.

  Liu Wuxie was quietly focused on refining medicine, looking at furnace after furnace of Yuanyang Dan, feeling extremely good.

  Each of these medicinal herbs, after undergoing the mysterious transformation of Taohuadan's divine sprouts, has greatly enhanced the quality of the spiritual medicine. The refined elixirs have an even better effect.

  After refining dozens of furnaces, he finally stopped. The dan furnace was thoroughly heated and could refine fourth-grade elixirs.

  The medicinal materials on the shelf had been consumed by about half, and with a wave of his hand, the flames suddenly surged violently, the intense heat making the alchemy room extremely hot.

  Liu Wuxie took off his outer garment, leaving only a close-fitting undergarment. His hands formed strange seals.

  Refine Bone Pill!

  As its name suggests, it has the effect of tempering the skeleton, strengthening the body and bones, making the skeleton more resilient.

  Especially for sword cultivators, they like to cultivate into a sword bone, every inch of their bones is cultivated as a divine weapon.

  Liu Wuxie uses a short knife, with more stringent requirements for the bones. The stronger the skeleton, the smoother the knife will be when wielded.

  Refined Marrow Pill!

  Refine the bone marrow in the human body, the essence of washing the marrow is to wash the essence and replace the marrow, transform the fetus and change the bones.

  Refine Soul Pill!

  The soul power in the Soul Refining Sea is many times higher than that of the Gathering Soul Pill. The Great Yan Imperial Court does not know about this kind of pill, which was broadened by Liu Wuxie from other pills.

  These three elixirs cannot directly allow Liu Wuxie to break through the Washing Spirit Realm. The main purpose is to accumulate foundation.

  He cultivated the Devouring Heaven Technique and possessed the Devouring Heaven Cauldron, requiring resources that were dozens of times more than what ordinary people needed.

  These elixirs can be prepared in advance to lay a solid foundation and accumulate enough strength for a breakthrough.

  Liu Wuxie could refine many elixirs that rapidly increase one's cultivation level, but he didn't do so. Relying on elixirs to boost one's cultivation level has many drawbacks in the long run, just like Xue Baisheng, impressive at first but useless later on.

  Impact Washing Spirit Realm, a single Impact Spirit Pill is enough, resulting in an unstable foundation, and the cultivation speed will actually slow down afterwards.

  Dan medicine is just an auxiliary tool, cultivation still relies on oneself.

  These elixirs mainly aim to refine the tibia, wash the marrow and cut the hair, uplift the soul, three tubes down together, washing the spiritual realm is expected soon.

  The first step is to refine the Bone Tempering Pill!

  Using tiger bones, earth dragon bones and other rare beast bones, extracting the essence from their skeletons, combining with spiritual medicine, refining into a pill.

  The Bone Tempering Pill rewarded by the Academy was too ineffective. When Liu Wuxie swallowed it, the effect was minimal.

  Although it was a reduced version of the Bone Tempering Pill, Liu Wuxie didn't dare to be careless, and the four-grade medicinal herbs couldn't be compromised.

  The congenital boundary refines the four kinds of elixir, if this is spread out, I'm afraid no one will believe it.

  Flames roared, enveloping the entire alchemy furnace. The first tiger bone was thrown in, emitting a sizzling sound as it rapidly dissolved into golden liquid droplets that flowed within the furnace.

  One after another, more and more hard bones were thrown into the alchemy furnace, merging with the tiger bone.

  A few rare Four-Spirit Elixirs were tossed into the alchemy furnace, and those dissolving liquids emitted restless auras that repelled each other.

  With his hands forming a seal, Liu Wuxie refined the elixir. What he relied on wasn't his cultivation level, but rather his technique.

  There is no one here, so Liu Wuxie has nothing to fear about leaking the alchemy hand techniques. Various rare handprints form countless spiritual patterns, floating around the alchemy furnace and merging into it.

  In the alchemy furnace, a whole large basin of liquid was floating and sinking, emitting all sorts of strange roars.

  These skeletons contain the memories of those demonic beasts before they were refined, and their ferocity was stirred up, wanting to break free.

  "Hmph, you've been dead for so long, and yet you still want to break free!"

  His hands suddenly pressed down, and two yin-yang fish diagrams appeared, covering the empty space above the dan furnace. The roaring sounds disappeared.

  Continue refining, the earth's core flame is getting stronger and stronger, and the liquid inside begins to solidify, developing towards the shape of Dan medicine.

  An hour passed, and a faint collision sound came from the dan furnace, like a string of pearls colliding with each other. Each Lian Gu Dan was only about the size of a soybean, but it was incredibly heavy.

  As time passed, the crashing sounds coming from inside the dan furnace grew more and more intense.

  Like thunder and tiger's roar, it shook the dan furnace left and right, these Bone Refining Pills were of extremely high grade.

  "Cease fire!"

  The palm cut horizontally, covering the yin-yang fish on the dan furnace disappeared, a group of misty air transformed into a fierce tiger shape, pounced towards Liu Wuxie.

  These Refining Bone Pills have a very strong spiritual energy, and through small seals, they can transform into all sorts of different forms.

  Liu Wuxie blew a breath, the ferocious tiger that was pouncing on him suddenly disappeared, turning into thin air, and immediately a thick fragrance of cinnabar wafted through the entire alchemy room.

  Inside the cauldron, twelve Bone Refining Pills were neatly arranged together. Each pill was covered in dense medicinal lines.

  "Good luck!"

  Take out the porcelain bottle and put them all in it, rest for a while, and continue to refine.

  He took out a large handful of Yuan Yang Dan and swallowed it down, replenishing the consumption of his true energy.

  After refining his essence and spirit, he began to refine the Refining Marrow Pill.

  At this moment, more than half of the day has passed outside, and Liu Wuxie plans to complete all the refining in two days, leaving three days for closed-door cultivation.

  The Lian Mei Dan is different from the Lian Gu Dan and requires a gentle fire to refine it, with more stringent requirements for the flame.

  One fierce fire refines, one small fire simmers slowly.

  Took out several porcelain bottles from the storage bag, poured out some red liquid, and flowed into the alchemy furnace.

  This is not a monster's bone marrow, but a liquid extracted from a kind of spiritual medicine.

  Picked up ten stalks of spiritual medicine and threw them in, starting to decoct.

  Refining the elixir of life can't be rushed, with his right hand holding a cattail fan, gently fanning the flames, every step extremely slow.

  One side refined the Washing Marrow Pill, while the other circulated the Taohuang Swallowing Heaven Technique. The dense spiritual energy seeped up through the flame conduit.

  This flame passageway leads directly to the Blazing Sun Cave, and the astonishing Blazing Sun Qi covers the entire Alchemy Room.

  In just a few breaths of time, a faint spiritual rain formed above the alchemy room.

  Although it's not as good as the Blazing Sun Cave, it's still much better than the outside environment, and doesn't waste any cultivation time.

  He took out a Refining Bone Pill and swallowed it in one gulp.

  Like a thousand pounds of weight, the moment the Bone Refining Pill entered his stomach, it was as if he had swallowed a lead block. His stomach let out a rumbling sound and suddenly dropped.

  The elixir entered his abdomen and instantly dissolved, forming a mighty energy that surged into his four limbs and hundred bones.

  Every inch of bone was like being wrapped in flames, undergoing a crazy calcination.

  The piercing pain made Liu Wuxie let out a mournful cry, gritting his teeth and holding back the scream.

  His limbs and bones became stiff, unable to move for a moment. The energy of the Bone Tempering Pill transformed into tiny knives that fell onto his bones, gently scraping them.

  Each time he was scraped, Liu Wuxie's body trembled, and finally learned what it meant to scrape the bone to cure the wound.

  He didn't scratch just one spot, but his whole body.

  Remove a layer of grime that covers the surface of the skeleton, and the remaining energy seeps into the bones.

  The next scene, Liu Wuxie couldn't understand it a bit. Some inexplicable patterns appeared on the skeleton.

  These patterns he had never seen before, very strange, should have a great relationship with Lian Gu Dan.

  "The efficacy of this Refining Bone Pill far exceeds my expectations!"

  He could only comfort himself this way, and with these tattoos, Liu Wuyue discovered that his skeletal strength had greatly increased, far surpassing that of ordinary people.

  The body recovered freely and continued to fan the flames. The Refining Pellet still needed some time before it could be taken out of the furnace.

  Another Refine Bone Pill was swallowed, and this time's effect was far less than the last one.

  Every kind of dan medicine, if taken in excess, will greatly discount its efficacy.

  Mysterious Zone!

  A delicate courtyard, suddenly came various ceramics smashing on the ground and making a crashing sound.

  "I'm so angry I could die!"

  Ji Yang's hair was disheveled and his appearance looked quite frightening.

  He brought back the bodies of two attendants, found the dean to reason, and actually said that they had taken the lead, according to the college rules, knowing that the other party was a four-star alchemist, still taking action, violating the college rules, even if killed, it would be a crime deserving punishment.

  Ji Yang never thought that the Dean would already know about Liu Wuxie becoming a four-star alchemist.

  Originally planned to borrow the Dean's hand to deal with Liu Wuxie, this road is impassable now.

  The corpse was placed in the courtyard, he was a four-star alchemist, and the entire courtyard had only him living there.

  "Liú Wú Xié, you wait for me, I will kill you with my own hands!"

  Ji Yang spoke out almost word by word, with a flame condensing in his eyes. His rationality told him that he couldn't mess up now and had to think of a way to refine the fourth-grade elixir first.

  "Dan Bao Pavilion, that's right, I'm going there now. They have a four-star alchemy room."

  Traveling overnight, leaving Imperial College for Danbao Pavilion.

  He forcibly broke through the boundary, and the aftereffect was not cleared in time, basically cutting off his cultivation career.

  Liu Wuxie was completely unaware of all this, quietly focused on refining his elixir.

  In just one day and night, Liu Wuxie hardly slept or rested. The marrow pill had taken shape and emitted a rich fragrance of the dan.

  "Faster than I expected!"

  Stand up straight, with both hands starting to form a seal, entering the stage of condensing elixir.

  The Refining Marrow Pill and the Refining Bone Pill were completely different, not a single sound was emitted, the entire pill furnace was quiet, and the flames were slowly dissipating.

  Is it not because of the thick fragrance of cinnabar in the air that one would think the cinnabar furnace is empty?

  The fire damper was closed, and the terrifying cold ice true energy enveloped the alchemy furnace, instantly cooling it down.

  Inside the furnace, ten Lianyudan were quietly lying there, emitting a seductive dark purple glow.

  Take out an empty porcelain bottle and put away ten Refining Soul Pills, then continue refining the Refining Soul Pill.

  Time was pressing, so he rested for only half a watch and then threw himself into alchemy.

  All remaining medicines were taken out and the fire damper was opened, with fierce flames bursting out over a meter high.