Lin Yan solemnly stored the remaining White Silver Relic Gu and two Yellow Golden Relic Gu into his aperture.
He had already reached Rank 3 Peak, and the Rank 4 stone wall was firm and unyielding, not something he could break through in a short period of time.
Next, he decided to devote all his effort to creating Gu worms that could improve aptitude.
Without hesitation, Lin Yan closed his eyes and fell into a deep sleep. His consciousness sank into a dream, his figure appearing within a vast small world of blue skies, drifting white clouds, and quiet streams winding through open fields.
Dozens of figures sat in the distance, each with different appearances. Yet many were familiar—faces from reality. Shen Kuang, Lin Qingyao, and even Rank 3 Family Elders from the Cai, Wei, and Shen Families were all present.
Covering all age groups, different paths, and various stage of aptitude and cultivation. Every type was present—enough for him to begin.
Fortunately, after the Dream Derivation Gu reached Rank 3, it could simulate dao marks. This made the dream far more realistic, no longer just an illusion, but something that could truly support further development and evolution.
Some Gu worms, once refined and used, would not show any immediate effect. However, they could silently damage a Gu Master's future potential, creating hidden flaws that only appeared much later.
Lin Yan was extremely cautious with his body. No matter how small the possibility, it was always better to test thoroughly rather than take risks. He then began refining Gu, using Relic Gu as the main core, combining it with different Gu materials according to his understanding, and testing each combination one by one.
Boom!
A five-colored halo suddenly exploded in front of him, forming a powerful shockwave that swept across the grassland. Another failure.
Seeing this, Lin Yan's expression remained calm. He did not show the slightest frustration. With a wave of his sleeve, the scattered light gathered once more, and more than a dozen Gu materials reappeared in the dream, allowing him to continue refining.
In Gu refinement, failure was the most common outcome.
Each time, he would stop to reflect, carefully recording the reasons for failure—whether the Gu recipe itself was fundamentally flawed, impossible to refine, or if it was simply an error in the refinement process, which would then require repeated verification.
Often, the same set of materials had to go through hundreds of repeated attempts. And every time even a single Gu material was changed, the entire process had to be repeated from the beginning. It was tedious, repetitive, and mentally exhausting.
But Lin Yan did not lack patience. His gaze remained steady, just as it had been since his transmigration. Dreaming, deducing killer moves, fighting, refining Gu—from the initial fascination, to boredom, to even a faint sense of disgust—everything gradually dulled.
And within that dullness, something else took shape, an unyielding will.
Two years in reality, ten years in dreams—without noticing, he had long forged the mental strength of a true expert. Countless victories, repeated domination over his peers, had quietly built another layer of confidence within him.
A moment later, Lin Yan completed a successful refinement, producing a brand new, unnamed Gu worm. He immediately refined dozens more of the same kind and distributed them among the test subjects, having each one use them for testing.
The results were disastrous. Some Gu Master dream figures had their apertures collapse on the spot, their primeval seas shattering completely. Others self-destructed under unstable reactions. Some suffered severe bodily deformation, while others experienced mutations within their primeval seas, their essence turning chaotic and unusable.
Lin Yan did not reject any of these outcomes. Instead, he calmly accepted every negative result, analyzing each case in detail, tracing the cause, and recording the patterns before proceeding with further rounds of verification.
He recorded every failed Gu he created, classifying them into four types, simply naming them Gu Number One, Gu Number Two, Gu Number Three, and so on. Although they were failures, they were not without value—the simplest use was to harm others.
For example, Gu Number One could temporarily enhance a person's aptitude, but after three days, their aperture would suddenly explode, leading to certain death. An ordinary Gu Master would never suspect such a hidden flaw. These were all part of Lin Yan's accumulated foundation.
However, he did not spend all his time on this single task. When mentally fatigued, he would shift to refining Gu using the Family's recipes, treating it as a way to relax.
During his eight months within the Flame Lake Gu House, he spent the first four months completely mastering the various refinement paths of his own Gu set. In the latter four months, he became proficient in nearly all of the Family's Flame Path Gu recipes. Now, he had already begun studying Earth Path recipes, along with scattered recipes from other paths.
This process, in turn, supported the creation of Human Path Gu worms, continuously accumulating his foundation; the two reinforced each other.
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