Just a few days ago, when Chen Yue was perceiving the Source of Life, he noticed that the Source Space and the Source of Life had stopped growing. At first, he didn't think much about it, just assuming it was a normal hurdle in the cultivation process.

  However, now that he heard Vinia's explanation that apostles would only feel a bottleneck when they were about to advance to a higher rank, what did this mean? It indicated that Chen Yue was already at the peak state of the first rank. As long as he broke through this barrier, he could enter the second rank.

  Was this a good thing?

  Chen Yue didn't think so. He deeply understood the importance of the foundation. A tall building without a solid foundation was ultimately just a castle built on the sand. Once a wave hit it, it would crumble into pieces.

  Therefore, he had used that precious request to ask Vinia to conduct the basic training of apostles for him. From this, one could see how much he valued the foundation.

  If he had already started his cultivation for several years, Chen Yue would have thought that this was a natural manifestation of things falling into place. However, he also knew how difficult it was for apostles to advance to a higher rank.

  The difference between each rank was huge. Even a figure like Vinia was only a fifth-rank apostle, and this was the result of her thousands of years of cultivation. One could see how difficult it was to advance.

  Why were apostles so long-lived? In Chen Yue's opinion, perhaps it was to endure the long accumulation period.

  If the foundation was not stable, the only result would be that one would be burst to death by the powerful energy during the process of breaking through the barrier.

  Thinking about what this meant, Chen Yue's face turned pale.

  Vinia's small mouth also opened wide in an unseemly manner, and she stared at Chen Yue with a dazed look on her face.

  This disciple was really good at giving "surprises".

  Shaking her head vigorously, Vinia asked extremely seriously, "Chen Yue, are you sure that you have reached a bottleneck?"

  "If what you said is correct, then, indeed, I have." Chen Yue said in extreme dismay. His words made Vinia petrified on the spot.

  "This, how is this possible?" After being stunned for a long while, Vinia finally blurted out this sentence.

  Unlike Chen Yue, in her long life, Vinia had experienced far more than Chen Yue. However, this kind of situation was also extremely rare.

  Unstable foundation? Did such a thing exist for apostles?

  Vinia scoffed at the idea. The cultivation of apostles required a long period of accumulation. There was no shortcut at all. Only when the accumulation reached the upper limit would one naturally reach a bottleneck. It was impossible for a situation where the foundation was shallow but a bottleneck appeared.

  Since Chen Yue had reached a bottleneck, it indicated that his foundation had already been so profound that it had reached the limit of a first-rank apostle. There was no second possibility.

  However, after all, it had only been a little over a month. Thinking of this, Vinia became a bit hesitant again.

  Since it was a matter of great importance, she didn't dare to be careless.

  Vinia suddenly stood up and said solemnly, "Chen Yue, we must conduct a test to see if your foundation is really solid enough to reach the bottleneck stage."

  Everyone's Source of Life was equivalent to an encrypted safe and couldn't be perceived by others. However, there were still ways to calculate and verify the approximate level.

  Naturally, Chen Yue had no objection to this.

  The instruments that could conduct such tests were very precious. With the access rights that Kles Nor had granted to Vinia, it was impossible to use them. Helplessly, they could only go to find Kles Nor, who was hiding himself.

  However, perhaps because he felt that he had lost too much face, Vinia searched the entire core area but couldn't find any trace of him. When she asked West and the others, they also didn't know anything.

  At that moment, she got angry on the spot. Only when she threatened that she would demolish his training base if he didn't come out did Kles Nor walk out with a straight face.

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  "Vinia, what's the matter with you again?"

  He tried his best to hide his embarrassment. For apostles with extremely long lives, such an extremely embarrassing incident could be laughed at for hundreds of years. Therefore, at this moment, Vinia was no different from a plague god in his eyes. It would be best if he didn't have to see her.

  "I want to use the Element Measuring Instrument." With a disdainful snort, Vinia didn't have the mood to mock him and directly stated her intention.

  "Element Measuring Instrument?" Kles Nor was surprised. Generally speaking, only apostle apprentices or those who were about to summon familiar spirits from the Spirit Realm needed to use it. Both were to understand the intensity of the Source of Life and judge whether they could withstand the first impact of the familiar spirit.

  Could it be that this Chen Yue was already able to summon a second familiar spirit?

  Thinking of this, Kles Nor's mood became gloomy. His already unhappy mood became even worse with this possible speculation.

  If it weren't for this kid, he wouldn't have been distracted. Maybe the result of that battle would have been reversed, and it would have been Vinia who lost all her face. However, there was no "if" in this world...

  Recalling the extremely embarrassing scene that day, a fierce and hidden anger burned in Kles Nor's chest. He didn't think about who had set the trap first but just blindly shifted the blame onto Chen Yue.

  He definitely wouldn't let him have an easy time.

  Rolling his eyes, Kles Nor didn't refuse but instead readily agreed. He just put forward a request that Lili Dan should be tested first.

  In this way, he had a legitimate reason to watch from the side.

  Vinia thought for a while and agreed.

  The four of them entered the core area. After passing through a heavily guarded passage, they came to an instrument.

  In appearance, the Element Measuring Instrument was a house with a strange shape. It was unknown what material it was made of. There was a crystal screen on the outside, and its purpose was also unknown.

  Kles Nor didn't explain but just pointed at the house and said, "Lili Dan, you go in first."

  It seemed that it wasn't her first time to take the test. Lili Dan didn't hesitate and calmly walked towards the house. This house had no door, but she bumped into the wall as if she knew the way well. Half of her body immediately sank into the wall, and soon, she disappeared completely.

  After waiting outside for a while, Chen Yue saw the crystal screen light up, and six hollow pipes appeared. At this time, a substance like mercury appeared in the uppermost pipe, filling the gaps in the pipe. Soon, two-thirds of the pipe was filled with this mercury.

  "This mercury represents the intensity of the Source of Life. Each pipe represents the capacity of each rank. Look, Lili Dan's current Source of Life has not yet reached the limit of her rank, which means that she doesn't yet have the qualification to withstand the first impact." Vinia explained seriously beside him, "However, the Element Measuring Instrument is not completely accurate. It can only measure the approximate range. Generally, when most of the space in the pipe is filled, it means that she has the qualification to become an apostle and can give it a try."

  On the crystal screen, the mercury representing the intensity of Lili Dan's Source of Life progressed slowly after reaching two-thirds and was even slower like a snail later, which also made Chen Yue know that Lili Dan didn't yet have the qualification to become an apostle.

  No wonder those apostles wanted to join the Apostle Association. Chen Yue suddenly realized that with the existence of this instrument, the time to summon the familiar spirit for the first time could be determined. Although it wouldn't be 100% successful, it undoubtedly greatly increased the success rate.

  There were six pipes on this Element Measuring Instrument. The uppermost one represented the rank of apostle apprentices. Calculated in this way, this instrument could only test those below the sixth rank. However, thinking that even Vinia and others were only fifth-rank apostles, Chen Yue felt relieved.

  After a while, the mercury bar stopped flowing, and Lili Dan walked out of the house. The first thing she did after coming out was to look at the crystal screen. When she saw the position of the mercury bar, she couldn't help but look sad.

  "Don't be discouraged, Lili Dan. Compared with last time, you've already made a lot of progress. I think you'll be qualified for the impact next time." Kles Nor comforted her casually and then turned to look at Chen Yue, "It's your turn."

  Taking a deep breath, Chen Yue took one last look at the second pipe and walked towards the house without hesitation.

  Vinia looked worried. She was worried about Chen Yue and didn't notice that the moment Chen Yue entered the house, a hidden button was toggled.

  ...

  Passing through the wall was like passing through a water curtain. However, the moment he entered, Chen Yue found that he had come to a strange space.

  From the outside, one could never see the mystery of the Element Measuring Instrument. The floor inside the house was paved with countless fibrous substances, densely spread on the ground, flickering with a dim light. The walls and the ceiling were the same, giving people the feeling as if they had entered blood vessels.

  After Chen Yue completely entered, the countless dim lights in the house suddenly connected together, covering every bit of space in the house.

  Chen Yue narrowed his eyes slightly. Although he couldn't see anything in front of him anymore, his heart was as calm as an ancient well without any ripples. When he felt that the outside space had stopped changing and opened his eyes, countless illusions came flooding in.