The cave is spacious.

Previously, Wei Jingzhen had been immersed in the study of the geometry of the stone table, so he had not explored this cave carefully, but now that he had spare time, Wei Jingzhen began to explore around the surrounding stone walls, and from time to time he tapped the surrounding stone walls with his knuckles, and judged whether there was a hidden mezzanine behind the stone wall through sound. However, Wei Jingzhen quickly gave up this futile move, because he had already thought that if the craftsman wanted to collect something, he didn't need to set up any mezzanine at all, wouldn't it be convenient to directly arrange a space formation?

A person who is proficient in refining weapons must be a master of formations, this is a truth that is universally applicable in countless planes. Wei laughed to himself and walked back to the stone table to sit down again.

"If I were Lord Craftsman, then where would I place my Dong **?" Wei Jingzhen carefully experienced, sure that there were no formations arranged around. Of course, this is not to say that the formation arranged by the craftsman god will definitely be able to detect it himself, but Wei Jingzhen feels that since the craftsman god has left something for himself and says that he is at his disposal, he will not use a method that he has no possibility of obtaining to collect it.

"Will it be under this stone table?" Wei was stunned and tried to pull the stone table in front of him, and now the stone table rose in response and shook twice on the ground. "My strength is not small, and the fact that this stone table is being pulled by me does not mean anything. Wei turned the stone table upside down, along with the stone bench under his seat, and the two next to him, all of which were flipped over, but there was nothing unusual about it.

"It's amazing, this stone cave is so big, you can see it all at a glance. Since there is nothing on the walls, nor under the stone tables, what did the craftsman leave for me? Could it be that the air here is not good?"

Thinking of "air", Wei Jingzhen's eyes suddenly lit up, "Yes! It's the air here!" Wei Jingzheng didn't notice it at first, but now when he feels it carefully, he realizes that the air here has a slightly pantothenic smell, this smell is very light and light, if you don't feel it carefully, ordinary gods will not notice it at all. Because, for a god whose strength has reached a certain level, there is no big difference between breathing and not breathing.

Wei Jingzhen usually rarely breathes, and even if he does, it is not through his nose and lungs, but through his own skin, through every pore on the surface of his body. Because only through these pores can one absorb the surrounding aura to the maximum and absorb the extremely weak energy required by the body.

Now, Wei Jingzhen sniffed with his nose and immediately understood the origin of this faint sourness. It was a slightly corrosive gas, and Wei Jingzhen noticed that after he breathed through his nose, there was a slight burning sensation in his nasal cavity, in his trachea, and even in his body. This familiar feeling made Wei Jingzhen immediately understand the source of this gas - those blue fine sand outside.

Wei was shocked to know that the stone cave where he was now, and the little crocodile beside him, was located under a riverbed on this star, and in this riverbed, the material that was constantly flowing was not water, but a fine, blue fine sand. Although Wei Jingzhen didn't know what kind of substance this fine sand was, he knew that this blue fine sand had a very strong corrosive property, and even he didn't dare to let his body skin come into contact with these fine sand without any defense.

Although he knew that these gases were a lot of harm to his body, in order to find out what the craftsman had collected, Wei Jingzhen still sniffed with his nose, followed the acidic gas, and walked to a corner in the stone cave.

"That's it!" Wei was a little excited. Although the stone wall in front of him was not any different, after his own investigation, the faint sour gas emanated from this side of the stone cave.

"The things left by Master Craftsman should be stored behind this stone wall!" Wei smiled confidently, and with a stroke of his right hand, the space cracked with a "hiss", revealing a dark crack. Behind the crack, a dazzling blue light shines through, allowing one to clearly see a blue box inside.

"Sure enough, it's here!" Wei was stunned and stretched out his hand, holding the box behind the space in his hand.

The crack gradually closed, and Wei came to the stone table with the box in his hand, and began to carefully examine the contents in his hand.

The box is carved from a blue substance, like a blue crystal, crystal clear and shiny. "This box should be made of those blue fine sand in the riverbed, but it was lightly coated with a layer of film on the surface of the box by the craftsman god with the black soil by the river, so that people will not feel so hot to the touch. Wei knew that if it weren't for that gray film, his hands might have been corroded and melted by this blue substance again.

There is no lock on the box, only a clasp that can move up and down. Wei opened the box effortlessly, and took out a thick book that was neatly placed in the center of the box.

The cover of the book is also the same blue as the box, and there are several scribbled words written vertically in the center, which is the kind of "ancient witch script" that Wei Jingzhen knows.

"The Secret Book of the Instrument Spirit?" Wei Jingzhen read out the handwriting on the cover softly, and thought suspiciously, "Is this 'The Secret Book of the Instrument Spirit' left behind by the Lord Craftsman and can give me full control?"

Driven by curiosity, Wei couldn't wait to turn the first page of the scroll.

On the first page of the "Secret Book of the Instrument Spirit", there are no brilliant sentences or flowery words, just the kind of scribbled handwriting that Wei Jingzhen is already quite familiar with - "Wei Jingzhen, how are you? Besides me Morizelin, you are the second guy to read this "Secret Book of the Machine Spirits"!"

Scribbled handwriting, uninhibited intonation, is exactly the style of Morezelin's language.

Wei shook his head and smiled bitterly, "This master craftsman, dare to make fun of me!" stretched out his hand and turned the first page.

On the second page, there is noticeably more handwriting than on the first page. In the first few lines of the second page, Morezerin begins with a brief introduction to the contents of the Secret Book of the Instrument.

"The spirit of the instrument, the spirit of the artifact seal. The artifact, the sealer, the spirit of the artifact. Up and down in all directions, from ancient times to the present, all artifacts need to be sealed to support them. If the spirit of the instrument is strong, the artifact is strong, and if the spirit is weak, the artifact is weak, and the strength of the instrument depends on the spirit of the instrument, and it cannot be ignored casually......"

"It turns out that this is a book about machine spirits. Wei Jingzhen read a few words softly, and already had a general understanding of this "Secret Book of Instrument Spirits", so he skipped the prologue in front of him and flipped to the back