Ten thousand I am across the heavens

When the Ghostly Demon Lord was cultivating his experimental subjects, he had already considered their potential for reuse. One reason was to ensure the subjects were of the same cultivation style as himself. This made reuse much easier. Theoretically, the Devouring Immortal Aperture could only devour those of the same cultivation style.

Moreover, he would devour those of lower cultivation levels than himself. There was no need to worry about the Ghostly Demon Lord's cultivation level in the Soul Dao; although he had only recently achieved the sixth rank, he had already touched the threshold of a Grandmaster. Devouring the opponent's immortal aperture was no problem, especially since the opponent's immortal aperture was directly within his own body, making it even more convenient to devour without any waste.

Besides facilitating absorption, forcing the opponent to choose one's most proficient style also makes it easier to suppress them. In a situation of overwhelming power, the more similar the styles, the more severely the opponent is suppressed. Otherwise, while facing the soul attack, he could have countered with other styles' killing moves. Even if he still couldn't win due to being outmaneuvered, he could still have caused significant damage. The outcome could have been a draw.

However, if he allocates all his attributes to soul attack and soul defense, even with a newly learned top-tier killing move that allows him to reverse the tide of battle, he still cannot inflict serious injury on the Ghost Demon Lord in a short time. Once his full power kicks in, defeat will be inevitable.

The battle proceeded uneventfully, ending in an undisputed victory for the Ghostly Demon Lord. The unfortunate captive likely died without ever understanding how he had perished. He was on the verge of seizing a great opportunity, on the verge of a counterattack. Yet, he failed at the last hurdle. In his sudden death, he was clearly filled with resentment, so much so that the obsession formed by the earth spirit within him was determined to defeat the Ghostly Demon Lord.

The Ghostly Demon Lord, wanting to devour the opponent's immortal aperture, naturally couldn't allow the earth spirit to truly take shape. If this were outside, he truly wouldn't have a good way to forcibly devour someone else's immortal aperture; such a move is rare even for an eighth-rank expert, let alone someone like him now. But the current situation is different; the opponent died within his body. The immortal aperture was already inside him the instant it landed, and no matter how much the earth spirit struggled, it was already doomed.

But none of this was the biggest gain for the Ghost Demon Lord. The biggest gain was that it proved that the technique on the stone tablet itself was not harmful.

Even so, he didn't completely let his guard down. Because theoretically, there was still a possibility: he might also be an unfortunate experiment, just like the person he captured. He thought he had gained an opportunity, but in reality, he was merely someone else's stepping stone.

If someone becomes truly smug and believes themselves to be the chosen one, then they might not even understand how they died, and might even feel resentful about their death. In reality, everything had already been orchestrated by someone else.

However, the current benefits are too enormous. Even if there is a possibility that it is a trap, the Ghostly Demon Lord cannot give up cultivation.

Thus, he came into contact with a cultivation technique from the future for the first time.

To maintain a balance between the past and the future, the cultivation techniques employed by the Ghostly Demon Lord have been balanced and modified. Their functionality is quite extreme compared to other top-tier techniques. Their main function is entirely focused on the production and manufacturing of Immortal Gu Houses, offering negligible improvement to personal strength. Of course, this negligibility is relative to other top-tier killing techniques of the future.

Even so, the enhancement effect of this killing move is top-notch. It would be considered a top-tier technique even in the future. The more the Ghostly Demon Lord cultivated it, the more he could feel its exquisite nature. So exquisite that he had absolutely no room for modification. It's like an ordinary person facing a massive amount of code. They can see the intricate structure of the code itself, but without the relevant foundational knowledge, they have no way to change it in the slightest. Any arbitrary change, even a single wrong letter, could cause the entire program to crash and become unusable.

Even for the Ghostly Demon Lord, he can't find the interface to improve his killing move. It's like using a completely pre-packaged application without the corresponding tools. Even if he figured out some basic principles, he doesn't even have a way to improve it.

He could only marvel at the rapid pace of technological development, far exceeding his imagination, especially in the refinement of Gu worms. He was, after all, a master in the Dao of Refining, not far from a quasi-grandmaster, so he was acutely aware of how difficult it was to refine immortal Gu. But the refining methods recorded in the cultivation technique were simply unbelievable. They could utilize the power of heaven and earth while minimizing the impact of natural disasters. Achieving the highest success rate through balance was simply incredible.

The most terrifying thing is that multiple Immortal Gu with the same function can exist using this refining method. They are only similar in function, but there are subtle differences in the details. It's like exploiting a bug in the Heavenly Dao: identical Immortal Gu cannot exist simultaneously, but two Immortal Gu with similar functions cannot exist at the same time; their functions are almost identical. However, two Immortal Gu with different version numbers can be considered two different Immortal Gu. This indirectly achieves a certain degree of mass production of Immortal Gu. In a healthy commercial market, it would even be easy to trace the source through version numbers; if quality issues arise, the manufacturer can be directly identified.

Following the standardized process, the Ghostly Demon Lord successfully refined a Rank 10 Immortal Gu in just two attempts. This success rate was unbelievably high; so high that he could buy the materials and then profit more than tenfold by selling the finished Immortal Gu. This thing would never have trouble selling, because there were practically no Immortal Gu for sale on the market; each one was a trump card of the great immortals. Unless it commanded an extremely high premium, no one would be willing to sell it.

With his current success rate in refining Gu, even without further production of Immortal Gu Houses, he's already disrupting the market balance. However, he currently needs to maintain a low profile, so he's not in a hurry to sell. Instead, following the instructions in the cultivation technique, he's first building his own Immortal Gu House, a standard Gu worm production line.

Judging from the name of this Immortal Gu House, you can tell that this thing will definitely not be a rare item in the future. If there is a first type, there will most likely be a second type, a third type, and each type will definitely have more than one.

But in this day and age, this thing would be absolutely invaluable, a super asset on par with a national treasure. Even just looking at the descriptions in the cultivation technique made the Ghostly Demon Lord's heart race.

[To be continued]

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