"Ah!" Lin Yu couldn't help but let out a scream due to the sudden intense pain. The moment he stepped into the Iron Mountain Formation, he truly felt the scorching spiritual energy inside and the wild surging of a strange primordial magnetic force. Apparently, there were powerful formation restrictions set up around the Iron Mountain Formation, firmly sealing the spiritual energy and primordial magnetism within. Otherwise, since Lin Yu had been in the secret room for so long, he couldn't have failed to notice it at all.
At this moment, the spiritual energy and primordial magnetic flow within the formation were in complete chaos. These invisible forces that could cause substantial harm only made "pop pop" sounds when hitting the steel-like body of "Iron Beast of the Lin Family", Lin Tiefeng, and couldn't cause any substantial damage. But for Lin Yu, who had a "delicate body", it was like a nightmare.
At first, it was just that the wounds on his body burst open one after another. Then, the originally intact skin began to shatter and burn. Although the damage was slight, large-scale damage to the skin all over the body was still life-threatening.
Only then did Lin Yu understand why his father said that he would get new injuries during cultivation. The damage caused by the chaotic primordial magnetism at the moment was much more ferocious than that of the chandelier that fell the night before last.
Lin Yu knew very well that he couldn't count on Lin Tiefeng at this moment. After all, his father was often carefree. Although he had just shown some resourcefulness, who could guarantee that his usual character was completely a disguise? There was probably still some truth to it. Lin Yu circulated the meager qi sensation in his body. With his extraordinary mental cultivation after being reborn, he quickly mobilized the spiritual energy of the second level of the "Lin Family's Health-Nurturing Formula". The top priority was to protect his own physique and qi meridians and prevent the circulation of the spiritual energy in his body from being interfered with by the chaotic primordial magnetic force outside.
The Lin Family's Health-Nurturing Formula, like the Linmen Ghost Sword, was a peerless technique that had been passed down in the family for a long time. But unlike the Linmen Ghost Sword, which was specialized in killing and regarded as a top secret of the Lin family, it was a pure health-nurturing cultivation technique.
The Lin family not only didn't keep it a secret from the outside world but even made the most basic version public and allowed all families closely related to the Lin family to learn it. If the children of the Lin family's main branch wanted to learn it, they could even obtain the complete mental cultivation formula. If they had a certain status in the family, they could also consult the cultivation records of the family's predecessors and study them carefully.
This cultivation technique could be regarded as the first choice for the cultivators of the Blood Soul Clan to lay the foundation and clarify their qi. Its characteristics were gentle and soft, and it was almost impossible for people to go crazy due to improper cultivation. However, once a cultivator broke through to the Third Level of the Clarity of Breath Realm, any cultivator with a bit of ambition would choose to give it up. It wasn't that this cultivation technique was bad. In fact, it was extremely profound and mysterious, far surpassing other cultivation techniques in the clan. It's just that it was really too suitable for health preservation.
In other words, this cultivation technique wasn't very suitable for battles or other scenarios.
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The spiritual energy cultivated through the Lin Family's Health-Nurturing Formula was gentle and nourishing. Following the principle of gradual progress in the orthodox Taoist school, the refined spiritual energy was extremely pure. Other qi-refining practitioners could refine three to five wisps of spiritual energy after cultivating for one 周天. For a cultivator practicing this cultivation technique, if they could refine one wisp of spiritual energy after one a cycle of the celestial circuit，they were already mentally focused and talented.
Such a profound but also "frustrating" cultivation technique was indeed not suitable for young cultivators. Usually, only the logistics personnel who didn't want to participate in battles and the old and weak cultivators who had retired from the front line of the battlefield would seriously practice this cultivation technique. Because this health-nurturing formula was highly effective, the average lifespan of the Lin family's cultivators was twenty to thirty years longer than that of the cultivators of other families, and their aging speed was much slower. In this era of scarce spiritual energy, this data was quite astonishing. It was worth mentioning that, as measured by the Celestial Measuring Ruler, this health-nurturing cultivation technique belonged to a Basic Level One cultivation technique. Although it was a basic cultivation technique, it was more profound and complex than most high-level cultivation techniques in the world and could be called a holy scripture for health preservation.
At this moment, Lin Yu truly experienced the benefits of this cultivation technique. As the meager but pure spiritual energy spread out, the skin and muscles that were continuously burned and damaged by the surrounding primordial magnetic force greedily absorbed the spiritual energy like a parched land longing for rain.
Lin Yu's health-nurturing true essence not only fully protected the body's meridians but also unconsciously nourished the damaged meridians and body. In the past, Lin Yu had never thought that the pure spiritual energy nurtured by the health-nurturing formula could have such a miraculous effect.
In a trance, Lin Yu almost indulged in this wonderful feeling. The damaged body was nourished by the health-nurturing spiritual energy, giving him a feeling of ecstasy.
However, the good times didn't last long. Under the continuous erosion of the powerful magnetic force outside, Lin Yu's meager spiritual energy was quickly exhausted. Although this health-nurturing cultivation technique emphasized purity and longevity and had a relatively fast qi recovery speed, it was still not profound enough.
Soon, Lin Yu was once again tortured by the primordial magnetism. Lin Yu's will was extremely firm. Otherwise, he couldn't have survived the terrifying apocalypse for many years. Even though he was tortured by the surrounding primordial magnetic force as if being bitten by thousands of ants, he still gritted his teeth and forced himself to stay awake.
After being tempered by both the apocalypse and killing for more than thirty years, Lin Yu's mental cultivation was by no means exaggerated. In terms of the mental state, he had almost reached the peak of the practitioners in the Qi Refining Period. If he had enough cultivation power and a suitable body, he could now challenge the realm of Forging the Cauldron and Restoring the Foundation in the Foundation Establishment Period.
In Lin Yu's perception, the external primordial magnetic force gradually weakened, and the chaos of the spiritual energy and primordial magnetism within the Iron Mountain Formation seemed to be approaching the energy limit. Just then, the second wisp of pure health-nurturing spiritual energy slowly returned. Lin Yu had already suffered a great deal and quickly circulated this wisp of spiritual energy throughout his body. After a short period of comfort, there was even more intense pain, mixed with the itching and stinging pain after being repaired by the health-nurturing spiritual energy, which was even more unbearable.
But Lin Yu's body was empty of spiritual energy, so he could only grit his teeth and absorb the spiritual energy overflowing from the Iron Mountain Formation and silently wait for the refinement and return of the second wisp of spiritual energy true essence.
