While Physician Wu was away, Xu Su knew that the bottle would temporarily be safe within Green Eye Valley because he was the only one there. Normally, no outsider would rashly enter the valley. This guaranteed a small time period where it was unlikely for anything unexpected to occur.
Xu Su had already estimated when Physician Wu would return. If Physician Wu could not find any good medicinal ingredients in the nearby regions, he would probably want to go look in more remote locations. It was very likely that he would have to go to one of the ancient forests deep in the mountains where men rarely ventured. Only in those kinds of desolate regions would there be any chances of obtaining a few rare medicinal ingredients. However, Physician Wu would need at least a year in order to travel into the mountains, gather medicinal ingredients, and return to the valley.
Physician Wu had already been absent for almost half a year. Xu Su estimated that he had another six to seven months before Physician Wu returned to the Seven Clouds Sect. With the time he had left, Xu Su would do his utmost to hasten the growth of as many useful medicinal herbs as possible. He knew that he could not blindly squander the green liquid, so he planned to acquire only the medicinal ingredients that he would use in a few precious formulas.
Xu Su quickly proceeded to make the medicines that would augment his strength and help him break through bottlenecks. They were exactly the medicinal formulas that Physician Wu had left the valley to concoct. However, Physician Wu was forced to venture outside of the valley due to a lack of necessary medicinal ingredients. Any one of these ingredients would be virtually impossible for an ordinary household to obtain on the market because of their sheer rarity. The cultivators of Jung Hu would even fight over these rare treasures with all their might.
With Physician Wu's extremely brilliant medical expertise, he could concoct medicines that only he knew how to concoct, including never before seen formulas. Even so, although Physician Wu knew the method of producing these medicines, he was unable to do anything if he lacked the ingredients. Physician Wu could only sigh.
When Xu Su had previously studied the art of healing under Physician Wu's tutelage, he had been greatly interested in these rare recipes. Although he never previously expected that he would be able to concoct these precious elixirs, he remembered many of these recipes. Physician Wu had met Xu Su's enthusiasm to learn these formulas with an indifferent attitude. Whenever Xu Su asked, Physician Wu would teach Xu Su in great detail; nothing was concealed from his disciple. Physician Wu probably believed that his formulas and knowledge would be lost forever if he didn't pass them down.
Concocting these formulas had now become Xu Su's pastime. He eagerly went to the fields every day to accelerate the growth of the medicinal herbs in accordance with the formulas' requirements. When doing so, he didn't dare to relax in the slightest since he knew that his time was limited. He had to hurry and finish mixing these medicines before Physician Wu returned. Once the doctor arrived, Xu Su would conceal and put the bottle away, no longer able to easily use the bottle once more.
Xu Su did not have even the slightest degree of confidence that he would be able to use the small bottle in Physician Wu's presence without revealing its power. He knew in his heart that Physician Wu was an extremely shrewd and careful person. So Xu Su did not intend to tell Physician Wu about the bottle's secret.
Xu Su thought the relationship he had with Physician Wu was quite peculiar. It was definitely not as simple as an ordinary master-disciple relationship.
Physician Wu often looked at him with a peculiar look. This always made Xu Su think that Physician Wu was concealing a deadly secret from him. Especially in the past two years, Xu Su felt that this feeling had grown even stronger. This made Physician Wu and Xu Su incapable of having the intimate relationship between a common master and disciple. If there were nothing to say, there would be silence.
Physician Wu had actually treated him exceptionally well in his daily life, never physically or verbally abusing Xu Su. In addition, Physician Wu spared no pain or effort to help create the best conditions for Xu Su to cultivate the chant. However, there seemed to be a barrier of separation that existed between the master and disciple, an awkward atmosphere that drifted between them.
Physician Wu clearly realized that this gap existed. However, he did not feel the slightest need to remedy the mutual indifference between master and disciple, leaving it to be. The only time when he directly involved himself in Xu Su's life was whenever he urged Xu Su to increase the pace of Xu Su's cultivation. Every time Physician Wu visited Xu Su, the grotesque aspect of his gaze gradually lessened, so much so that after a long period of time, it was no longer displayed.
However, Xu Su's keen sixth sense faintly informed him that Physician Wu hadn't truly abandoned his plans, but rather ingeniously concealed his intentions. Thus, Xu Su's vigilance against Physician Wu had deepened further. Under these circumstances, how could he possibly dare let Physician Wu know of the bottle's secret?!
Xu Su had learned an unshakable lesson from reading numerous history books: "refrain from hurting others but guard against those trying to hurt you."
Regardless of whether Physician Wu truly wanted to harm him, strengthening Xu Su's vigilance wouldn't be a bad decision, even if his feelings were mistaken. If Physician Wu had truly intended to harm him, Xu Su's strengthened vigilance could possibly prevent him from suffering a severe injury. If his sixth sense was mistaken, then a strengthened vigilance wouldn't harm him. Either way, Xu Su wouldn't take the initiative to harm his master. Xu Su was still Physician Wu's apprentice and would do his utmost to be a filial apprentice.
Xu Su wasn't too comfortable with his feelings regarding Physician Wu. After all, this kind of strange master-disciple relationship was completely unheard of in the Seven Clouds Sect. Thinking of this, Xu Su could not help but sigh.
The mysterious green bottle absolutely couldn't be used once Physician Wu returned. However, Xu Su knew that even if he managed to somehow hide it from Physician Wu, another person from the Seven Clouds Sect might uncover the secret by accident. His best choice was to hide the bottle away forever and act as if it had never existed.
Unwilling to forever separate himself from the bottle, Xu Su made up his mind to use the bottle cautiously and secretly once Physician Wu returned. Once he came upon this decision, Xu Su relaxed his mind and fell asleep on his bed.
In the following months, Xu Su secretly used the bottle's green liquid to accelerate the growth of large quantities of precious medicinal ingredients. He then used these medicinal ingredients in accordance with the formula, concocting many rare medicines. But in the process of concocting the elixirs, many failures had occurred. Each failure had left Xu Su with a lasting soreness since the ingredients used to make the medicines were rare and of the highest quality. Each failure represented a waste of an innumerable amount of silver. However, he could not be blamed. These were the first time he compounded these formulas, so failing several times was inevitable. Even if Physician Wu had personally compounded these medicines, he would have made one or two mistakes. Only in this way could Xu Su console himself.
" Yellow Dragon Pellet," "Pure Spirit Powder," "Gold Essence Pill," and "Vitality Raising Pellet." These rare medicines, rarely seen on the market, were placed in tens of small bottles. One by one, they were neatly arranged in front of Xu Su. As Xu Su looked at these small bottles, his face lit up with delight. With these miraculous medicines, he could reach the fifth and sixth layer without expending too much effort, not to mention the fourth layer.
Among these medicines, "Yellow Dragon Pellet" and "Gold Essence Pill" would assist him in increasing his strength, thereby raising his power, and had the wonderful effect of rebuilding his body and bones. "Pure Spirit Powder" was a world-famous detoxifying panacea, capable of dissolving thousands of deadly poisons. Lastly, "Vitality Raising Pellet" was a legendary medicine that had a surprising effect on internal injuries. Regardless of how many grave internal and external injuries one suffered from, so long as the person eating the pill remained alive, any injury would be immediately healed, allowing one's life to be preserved.