Examine you (ask for recommendation and collection!)

  Lin Feng carefully observed the crucible in front of him, three-legged, pointed top, all over dark black, with faint floral patterns engraved on the body of the furnace, but now the crucible was covered with dust, apparently it had not been used for a long time.

  Lin Feng infused his spiritual power into it, but the alchemy furnace didn't react at all. He put some medicinal herbs in, and there was still no movement.

  "As expected, it's strange." Lin Feng scratched his head, no wonder this dan furnace looked extremely old and hadn't been used for a long time, looking like a completely useless waste product without any spiritual energy.

  But Lin Feng didn't intend to doubt Zhu Yi's luck, he entered the exchange system and pulled out a list to check one by one.

  The strange flower pattern on the furnace can serve as an important identifier.

  Hard work pays off for those who are diligent, Lin Feng almost found a dan furnace at the very bottom of the list, its characteristics extremely similar to the one he had on hand.

  The Heaven's Furnace is forged from the fallen star iron outside of heaven, and when refining elixirs, it naturally produces a fierce flame that adds a powerful force, thus greatly increasing the success rate of elixir refinement.

  Required exchange points... 3000 points!

  Lin Feng patted his forehead and wished he could immediately go to the next room and give Zhu Yi a hug.

  3,000 points? Even if he sold it, he wouldn't be able to accumulate that many redemption points.

  From the time the system was activated until now, including the novice gift package, Lin Feng had accumulated a total of only 2,800 exchange points.

  Lin Feng's 700 exchange points were barely enough to buy one leg of the Heavenfire Furnace.

  "Not bad, really not bad!" Lin Feng was delighted, but soon a doubt arose in his mind.

  Why didn't anyone discover this excellent elixir furnace?

  One or two people can't discover the secret of Dan furnace, but all those who have passed through it can't discover it either?

  With this question in mind, Lin Feng carefully looked up the information on the Heavenly Heart Fire Furnace and found a statement that said: "Only with the Seven Great True Fires can the function of the Heavenly Heart Fire Furnace be brought to its ultimate."

  Lin Feng blinked his eyes repeatedly, a hint of bitterness in his mouth, and finally understood why others couldn't discover the wonderful use of this dan furnace.

  The Seven Great True Flames, the pinnacle of fire power in this world. Each one can infinitely increase its might, tyrannically unbounded, destroying heaven and earth. How could their flames be so easily trifled with?

  Lin Feng pressed down on his temples, which were throbbing with a dull ache, and told himself to calm down, carefully studying the documentation for the Heavenly Fire Furnace word by word.

  "Bring to an extreme... That is to say, even the spiritual fire that is slightly lower than the seven great true fires can make this cauldron work, but it cannot bring out its full potential. Lin Feng pondered for a moment: "The higher the level of spiritual fire, the more obvious its effect. If the level of spiritual fire is too low, it will not be able to drive this cauldron."

  Thinking of this, Lin Feng's heart calmed down.

  The Akashic King's Fury is a high-level spiritual fire that is widely recognized as second only to the Seven Great True Fires.

  Lin Feng immediately set up the Twenty-Four Arhat Formation, and then used the previous method to condense the Unmoving Bright King's Fury with the three Flame Arhats as the core.

  A small white flame fell into the outer cauldron of Tianwai Xinhuo, and the Dan furnace changed instantly.

  As if a giant who had been sleeping for a long time finally woke up.

  Around the motionless White King, a bright red flame suddenly burst into being, jumping up and down as if it were a powerful, beating heart.

  As this "heart" beats, a fiery red pattern emerges on the inner wall of the crucible.

  At this time, the originally palm-sized Heavenly Fire Furnace rapidly enlarged to two meters high and nearly two meters in diameter before stopping, steadily landing on the ground, from which a shocking wave of magical power flowed out.

  Lin Feng laughed: "That flame that looks like a heart, should be the so-called Heart Fire, hum... it's indeed extraordinary. The burning power of the flames is not much different from the anger of the Unmoving Bright King."

  A good alchemist cultivator usually practices fire-based Dao methods, using their own true fire to transform into Dan fire for refining elixirs.

  Lin Feng had been practicing the Bright King's Scripture but hadn't moved, however his magical powers and alchemy flames were now available, but he had never refined a pill before and couldn't help feeling apprehensive.

  Lin Feng carefully controlled the fire in the crucible as he placed the medicinal materials for refining the Leiyin Dahuan Dan inside.

  Sometimes, it has to be admitted that learning something indeed depends on innate talent.

  Lin Feng worked hard all day, bustling about for half a day, and finally opened the furnace to retrieve the elixir, only to find that what appeared before his eyes was just a furnace of charcoal.

  "Is the firepower too strong? Or is the medicine not matched?" Lin Feng scratched his head in distress, the medicine was still abundant, but he couldn't let him practice like this.

  Lin Feng furrowed his brow and pondered for a moment before a sudden flash of inspiration appeared in his mind.

  "All of you, brothers and sisters, come to my room together with your eldest brother." Lin Feng calmly transmitted his voice to Zhu Yi and others next door, then sat cross-legged, quietly waiting for the arrival of several disciples.

  Xiao Bu Dian pushed the door open first, looking at Lin Feng with a puzzled expression, as well as the stove that was almost touching the ceiling in Lin Feng's room.

  Behind him, Zhu Yi and Wang Lin walked in with a stretcher, one in front of the other. Xiao Yan was lying on the stretcher, his face pale, but his mood wasn't too bad.

  "The disciples have seen their master." The four of them said in unison, except for Xiao Yan who was lying down and unable to move, the other three bowed together.

  Lin Feng nodded slightly and said, "Have you all seen this dan furnace in front of us?"

  Four people nodded together, Zhu Yi asked: "Master, is this the Dan furnace from before in Fang City?"

  Lin Feng smiled slightly: "This furnace is called the Heavenly Heart Fire Furnace, its uses are endless. Unfortunately, it was previously covered in dust, but now that I've reactivated it as your master, it will reveal its true appearance."

  Zhu Yi exclaimed in surprise: "It's truly a strange object."

  A little fellow by their side asked: "Master, did you call us here just to see this dan furnace?"

  Lin Feng shook his head and replied: "No, Master called you over here to test you."

  Examine us?

  The four of them looked at each other in dismay. Xiao Yan, who was lying on the stretcher, spoke softly: "What kind of test is this? Please enlighten me, Master."

  Lin Feng pointed to the Heaven's Furnace outside and said lightly, "In order to heal Xiao Yan's injuries, I am currently refining a Dan medicine. However, I intentionally made a few mistakes in the process, so with the current method, it is destined that no Dan will be produced."

  "Now, I'll test you all to see if you have the innate talent and spiritual nature for alchemy. Can you find the mistakes that I intentionally left in this recipe?" Lin Feng said seriously as he handed them the recipe for the Lei Yin Great Returning Dan and explained the function of the Tian Wai Xin Huo furnace.

  "Am I too shameless? Just ordinary...” Lin Feng thought to himself, still with a calm and composed expression on his face. He said lightly: “You can discuss among yourselves, I'll just listen from the side. Whoever comes up with the correct view, I'll take note of it in my heart.”

  The four of them exchanged a glance and then gathered around Xiao Yan's stretcher, discussing in hushed tones.

  Lin Feng secretly perked up his ears to listen to their discussion and compared it with his own views, gaining a lot from it.

  It has to be said that the system's judgment is very accurate. Among the four, Xiao Yan was the quickest to grasp the art of alchemy and had the deepest understanding. He also found the most mistakes in Lin Feng's original alchemy method.

  As for whether it is accurate, it remains to be verified.

  In the end, the other three also voluntarily nominated Xiao Yan to make a concluding speech.

  “…Heavenly Bone Grass cannot be put into the alchemy furnace as a whole, it must be crushed into powder first; Frosty Dew and Azure Fire Phosphorus Grass must be mixed together before being thrown into the alchemy furnace, they cannot be added separately. Xiao Yan summarized, hesitated for a moment, then continued: "Also, I think we should advance the ignition time by half an hour, but I'm not sure about this."

  Lin Feng's expression was calm and serene. After listening to Xiao Yan's words, he raised his head and asked the other three people: "Do you have anything else to add?"

  The other three people all shook their heads, and Lin Feng smiled and said: "Everyone has had their say, isn't it going to change?"

  Xiao Yan gritted his teeth: "I won't change."

  Lin Feng stood up, smiled and said: "Let's not make too many comments, let the facts speak for themselves. Let's use your method to refine a furnace of Dan and see what the final result is." After that, he followed Xiao Yan's instructions to process the medicine, start the furnace and refine the Dan.

  Lin Feng controlled the fire in the furnace, and his four apprentices all stared intently at the dan furnace, with Xiao Yan being especially tense, his palms even sweating slightly.

  The four didn't know that Lin Feng was actually even more nervous than they were, staring intently at the dan furnace: "You little brat, you'd better come through for me."