Chapter 642: Top grade elixir

　　 "Netherworld ghost fire!"
　　 Wu Tianyi screamed out after being in a daze.
　　 Those three invigilators were all taken aback.
　　A pharmacist refining medicine basically uses fire.
　　The quality of the flame determines the quality of the elixir.
　　The flames condensed with energy by the general alchemist are the most common energy fire.
　　 The five element flames collected by some alchemists from the five elements can deal with medicinal materials of different attributes, and the quality is higher than ordinary fire.
　　 But other than that, they don't know about other flames.
　　 So the three of them all looked at Wu Tianyi suspiciously.
　　 Wu Tianyi explained: "In addition to the ordinary flames and the five-element flames you know, there are three high-quality sacred fires: Heavenly Thunder and Earth Fire, Chaos Primal Fire, and Nether Ghost Fire.
　　 But these three kinds of flames are all met but not desired.
　　 is like the sky thunder and earth fire. It is a flame formed under extremely harsh conditions after lightning strikes the magma in the volcano.
　　 And after this kind of flame is formed, it can only exist for a short time. Even if the alchemist encounters it, he luckily uses it to refine the elixir.
　　 But it is impossible to use this kind of flame.
　　 After all, this kind of flame can only exist for a short time.
　　 Besides, Chaos Yuanhuo is even rarer.
　　 is said to be the spark formed when the ancient gods and demons fought and opened up the fairy world.
　　 It’s just that almost no one has ever seen this Primal Chaos Fire.
　　 Finally, let’s talk about the ghost fire. This kind of flame is very common: the ghost fire that you often see on the grave at night is very close to the ghost fire. But this is not the real ghost fire. The real ghost fires are those zombies that have reached their peak strength and can kill any martial sage in seconds. After death, the phosphorus in their bodies is mixed with the energy in their bodies.
　　 So the ghost fire is controlled by the zombie family. "
　　 When talking about this, Wu Tianyi sighed:
"Senior Medicine God once unintentionally caught a zombie and used that zombie's ghost fire to refine it into a top-grade 9th-grade elixir. It was also the only top-grade 9th-grade elixir in our entire history of the fairy world. Later, Senior Medicine God wanted to refining the ghost fire of the zombie for his own use, but unfortunately, there is corpse poison in the zombie's body. If it is refining, it will inevitably be poisoned and become a zombie.
　　 And the ghost fire can burn people's souls, or they can burn people's minds. This requires that the alchemist must have a strong mind, and this mind must be extremely solid. But it is almost impossible for human beings to reach that level of mind.
　　 In the end, Senior Medicine God could only give up. "
　　 When talking about this, the three invigilators were amazed.
　　 "But how can Zhang Fan refine the ghost fire?"
　　 "How does he refine the ghost fire that can't even be refined by Senior Medicine God?"
　　 "This guy... is incredible!"
Wu Tianyi also said: "How he refines, only after he finishes the exam, we will ask him. Now, let's see how he refines the three common materials into elixir. Ordinary materials are refined into elixir, and I am afraid that only Nether Ghost Fire can do it."
　　 At this time, Wu Tianyi's anger and disdain towards Zhang Fan had long been wiped out.
　　 replaced by expectation.
　　 He seems to have forgotten how he reprimanded Zhang Fan before.
　　 Zhang Fan’s face slap came too fast.
　　 hasn't refining medicine at all, and the flames only made Wu Tianyi softer by half.
　　 At this time, I saw the blue and white flame in Zhang Fan's hand, heating it under the medicine cauldron.
　　 Soon, I saw that the whole medicine cauldron was covered with a layer of hoarfrost.
　　 Then, the hoarfrost became thicker and thicker, turning into a layer of ice.
　　 The entire medicine cauldron, including the materials inside, is wrapped in ice.
　　 Seeing this scene, everyone was puzzled.
　　 "After the flame is heated, the medicine cauldron not only does not heat up, but freezes, what's the matter?"
　　 "I don't know. His blue and white flames look strange."
　　 "It's a hell, it's the first time seeing flames make things freeze."
　　 Yao Lao is looking thoughtfully at the big screen.
　　 In the proctoring room, the three proctors all looked at Wu Tianyi, waiting for Wu Tianyi to explain.
Wu Tianyi thought for a moment, and said, "I once read "Fire Theory" written by Yaoshen. It says that the ghost fire is cold outside and hot inside. The outer layer of blue is cold, and the inner layer of white is It's hot. Looking at Zhang Fan's appearance, I'm afraid it will be refined according to the fifth situation mentioned in the answer to his first question."
　　 The three people listened, and remembered.
　　 The fifth situation mentioned by Zhang Fan refers to refining under extremely cold conditions.
　　 Although it is not the condition of extreme cold now, the outer flame of the ghost fire is cold, and he wants to use the ghost fire to create the extreme cold condition.
　　 Sure enough, in the picture, the ice layer created by the ghost fire has frozen the entire medicine cauldron into a large ice pile with a diameter of one meter.
　　 Until then, he slightly moved his hand closer to the medicine cauldron so that the inner flames inside could touch the medicine cauldron.
　　 At this time, I saw the center of the medicine tripod, and it began to melt slowly.
　　 Through the detection of on-site instruments, it can be seen that although the ice layer outside the medicine cauldron has not melted, it has melted in the middle.
　　 The three medicinal materials began to be slowly heated.
　　 According to Zhang Fan, the ice layer freezes the toxins in the material to a dormant state.
　　 And slowly heating, just like boiling a frog in warm water, it will slowly kill 90% of the toxins in the medicinal materials, thereby greatly improving the efficacy of the medicine.
Master He finally spoke at this time: "Now that Zhang Fan is using Netherworld Ghost Fire, this effect will be improved a lot. It is very likely that it will kill more than 99% of the toxins in the medicinal materials. In this way, The efficacy of the medicine has been improved a lot. Maybe it can be more than fifty times the original!"
　　 At this time, the picture that people see is very strange ~ EbookFREE.me~ There is a layer of ice outside, and there seems to be a faint flame burning quietly inside the ice layer.
　　 This process lasted about five minutes.
　　 The ghost fire in Zhang Fan's right hand finally extinguished and turned into energy to recover Zhang Fan's body.
　　 Wu Tianyi and the three invigilators felt reluctant to part with Zhang Fan's ghost fire.
　　 This kid can actually master the ghost fire, one of the three magical sacred fires, which is really enviable!
　　 In the examination room, in front of Zhang Fan, there was still the one-meter-diameter ice tuft.
　　 is slowly melting.
　　 But Zhang Fan didn't wait for him to slowly melt, so he tapped twice on the ice with his right hand.
　　 click
　　 Dozens of cracks suddenly appeared on the ice.
　　 Finally, with a crash, it broke into small ice cubes on the ground.
　　 What appeared in front of everyone was a drop of turquoise liquid medicine.
　　 And this liquid medicine has a green light swaying on it.
　　 The light is so dazzling, it makes people's eyes a bit tingling.
　　 Seeing this, everyone took a breath: "High-grade elixir!"
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