It's just that the mysterious black shadow didn't give the order for a long time, and the two of them could only stand in place and wait.

Looking at the scab of the medicinal liquid that gradually solidified on the surface of Gu Chensheng's body, there was not the slightest crack, and the mysterious black shadow sighed secretly: "Sure enough, there is perseverance." ”

He was waiting, waiting for the moment when Gu Chensheng couldn't hold on, and this time he forcibly increased the strength of the spirit shell, to see how long this kid could endure.

The spirit shell does have the level of reaching the peak of the earth level, but it is not just a matter of pouring energy into the brain without any foreshadowing, and the root of its ascension still depends on the qualification of the host itself, otherwise, as long as the materials are sufficient, he will not be able to rule this world by creating a number of heaven level spirit shells.

At this time, the most depressed person in the field was Cao Bin.

He originally wanted to come here to steal the teacher, but at the beginning, he was startled by the mysterious black shadow's medication methods.

The snow mountain ice spring is used to soak the body, this Cao Bin can still understand, after all, after the strength reaches the ground level, the quality of the body wants to go to the next level, in addition to the training on weekdays and the improvement in battle, it is only with the help of these extreme spiritual objects bred by heaven and earth to polish the body.

But when he blinked twice, he found that what the mysterious black shadow did next had completely exceeded his expectations.

Why did the magma fruit and the molten spirit flame put together in the basin? Oh my God! The boy had a thousand poison ointment in his mouth, right?

Damn! I swallowed it.

Cao Bin didn't expect that one day he would be shocked like a beginner when he watched others dispense medicine, although he was not very good at pharmacology, but that was also relative, as the dean, he had also read some books about the treasures of heaven and earth on weekdays, which naturally included the so-called mutual restraint, but at this time, all those knowledge turned into virtual shadows, and Cao Bin had been completely subverted by the boldness of the mysterious black shadow.

If it weren't for the fact that he knew that this guy didn't need to expend too much effort whether he wanted to kill Gu Chensheng or anything else, all this that was happening in front of him would definitely make Dean Cao think that the mysterious black shadow was torturing an enemy.

But no matter what, this broken tendon and broken bone powder is a bit too much...

Cao Bin was still shocked here, but on the other side, Gu Chensheng had been carried into another bucket by Ning Jing and Ma Zhao, and a torture that almost replicated the previous one was staged again.

And under the instruction of the mysterious black shadow, Gu Chensheng couldn't even let out a trace of wail.

Cao Bin muttered a little: "Is this improving people's strength..."

He just doesn't understand it, I'm afraid he can see that what the mysterious black shadow is doing is too violent.

He is here to learn, if he really takes this method as the truth, he is afraid that the pride of the sky in Fancheng will die in his hands.

Looking at the reactions of Ma Zhaoning and the others, they knew that if Dean Cao Bin hadn't stayed here to watch, they were afraid that they would not have participated in this tortured refining at all.

The mysterious black shadow's attention was highly concentrated, and he didn't think about explaining anything to Cao Bin at all.

Although the spirit shell is used as a body, it is strictly speaking, closer to an instrument.

Therefore, for ordinary people, and even ordinary cultivators, this tempering that touches on mortality is only suitable for refining the spirit shell.

It's like a sword, when it is first polished, it even needs to be melted at a high temperature, and it needs to be hammered thousands of times. Do you change to a Heaven Rank master, refine him first, and then try to beat him with a hammer?

Therefore, it is normal that Cao Bin cannot understand.

"Alas!" Cao Bin paced back and forth anxiously, what a good opportunity to observe, it was really a pity to see that it was wasted like this.

However, at this juncture, he could not interrupt the rhythm of the mysterious black shadow.

It's just that he, an anxious man, can only endure the many questions in his heart, looking at the few people who are busy over there, as for the idea of stealing the teacher, he has already been thrown out of the clouds.

In fact, not only Cao Bin, Ma Zhao and Ning Ning were already numb on the side, they mechanically helped the mysterious black shadow to deliver all kinds of spiritual treasures, some of which can be called healing holy products, and some can also prolong life after taking them, but most of the spiritual treasures that were thrown into the barrel were those that had not yet been refined and still had toxins that caused great harm to cultivators.

And as time went by, this condiment became heavier and heavier, and even later, even the air in the room was filled with quite thick toxins.

Cao Bin didn't know which way he was crazy, but he also had the courage to take a deep breath, and in an instant he was so dizzy that this heaven-level powerhouse almost vomited, and he hurriedly used his true qi to force out the toxins in his body.

He looked at Gu Chensheng, whose face was still ruddy, and his heart was even more puzzled. Although these toxins could not pose a threat to a Heaven Rank powerhouse, Cao Bin did not dare to try to inhale a second puff again.

The terrifying poisonous fog accumulated thicker and thicker, reflected in the lights, flickering a little fluorescent, and the tempering continued.

A few hours later, it was late at night.

In the room, several boxes of precious materials have been emptied.

Ma Zhao and Ning Jing also exited the room early, and they stood around to prevent anyone from approaching.

Gu Chensheng in the wooden barrel seemed to be asleep, and because his body was condensed by the scab, he didn't even need to deliberately maintain any posture.

Cao Bin started on the side, he glanced at the wooden barrel, those hodgepodge that had long been unable to distinguish what materials were originally made, I really couldn't figure out these things that would be fatal when ordinary people smelled them, how could this kid not be affected, and he could still settle down in it?

Observing Gu Chen's ruddy face under the scab of the raw medicine, he was still breathing between the ups and downs of his chest, and he really didn't look like a poisoned person.

And those smokes that he regarded as highly poisonous were being incorporated into Gu Chensheng's body in this exhale.

With the passage of time, Cao Bin could sense that Gu Chensheng's aura was increasing explosively.

"In this short period of the night, this kid actually jumped from the third order to the sixth order, if he hadn't seen it with his own eyes, the old man wouldn't have believed it. ”

As if hearing Cao Bin's muttering, the mysterious black shadow's movements were not slow, and he smiled: "It's useless for you to learn this method, don't say it's other little guys, even if you enter this barrel to remove all your true qi, I'm afraid you won't be able to survive for an hour." ”

When Cao Bin heard this, he said helplessly: "You know that I can't learn, that's why I'm so generous, right?" ”

"Lao Cao's words are a bit wronged. The mysterious shadow said.

"What are you going to do with the poisonous mist in this room later, once these ghost things spread out, my martial arts academy will suffer. Cao Bin waved his hand, looking like he didn't want to talk about this topic deeply.