Su Yuan shifted his comprehension focus to the Law of Mind. This was a rather obscure law, extremely difficult to begin with. Previously, Su Yuan hadn't planned to cultivate this law at all. He had attempted it before but couldn't find the entrance—comprehending it was simply too challenging. But now things were different. The inheritance contained complete secret comprehension methods called "Mind Tower"! It consisted of twelve levels, and reaching the eighth level could elevate the Law of Mind to the Great Luo level. Su Yuan immersed himself in comprehension, and in just three quarters of an hour, he successfully constructed the first level of the Mind Tower, building a tower foundation above his mind sea and erecting the first tower level! Within the tower level was a mental world that required placing nine hundred million first-order living beings' mental wills to complete the cultivation of the first level technique. "Truly worthy of being a demonic path cultivation method! The first level technique actually requires killing nine hundred million Human Immortals to succeed!" Su Yuan took a light breath! This kind of technique—if he cultivated it, he could actually achieve it! "Should mental incarnations be able to serve as substitutes?" Su Yuan pondered uncertainly. Mental incarnations, especially those inheriting deceased cultivators' bodies and souls, should be perfectly matched as mental wills to place within the Mind Tower! Su Yuan had accumulated many such mental incarnations, most having ninety-nine point nine nine percent of their power extracted, leaving only a trace of power supporting these discarded mental incarnations. These mental incarnations didn't have much power left, but their essence remained, still at first-order mental will level. They should be completely suitable as materials for the Mind Tower! With a single thought from Su Yuan, trillions of first-order mental incarnations entered the first level of the Mind Tower, far exceeding the nine hundred million first-order mental wills required by the secret method! Then, according to the technique's requirements, these external mental wills needed to be suppressed and subdued! This step was described in great detail in the secret method, which even specifically wrote multiple techniques for this purpose, all to smoothly suppress nine hundred million first-order minds. Moreover, this step was typically the most time-consuming. But for Su Yuan, this step was the easiest because these mental incarnations were actually controlled by his consciousness. They required no extra effort to suppress—he just symbolically used the simplest method from the technique to "suppress" them briefly. Then the trillion minds within the first level merged into the Mind Tower, making the first tower level extremely solid. When the Mind Tower was formally established in the mind sea, the previously occupying one-third violent mind sea immediately became restrained. The wildly surging seawater and rising waves decreased by more than half. The effect was very noticeable. Su Yuan continued comprehending and spent another two days building the second level of the Mind Tower. This tower level required ninety million second-order minds to fill. This quantity requirement remained terrifyingly high, but Su Yuan filled it very easily, far exceeding the requirement. The second level was also built extremely solidly. Over ten days later, Su Yuan successfully completed the sixth tower level. This level's requirement was utterly abnormal—it required nine thousand Golden Immortal minds to fill! This meant nine thousand Golden Immortals—the horror of this requirement was appalling. But Su Yuan still completed it. During the war between the Immortal Realm and Demon Realm, many fallen Golden Immortals existed, so although nine thousand was a large number, Su Yuan still achieved it. 𝒇𝒓𝒆𝒆𝙬𝒆𝒃𝓷𝒐𝓿𝙚𝙡.𝒄𝓸𝒎 This time he didn't exceed by too much. When the sixth level reached completion and perfection, the violent mind sea noticeably contracted, and the dead mind sea gained some vitality. Su Yuan spent another three months comprehending and built the Mind Tower to the seventh level! This requirement became even more abnormal, needing nine hundred Taiyi Golden Immortals for construction. This time, Su Yuan was genuinely stumped. The number of fallen Taiyi Golden Immortals wasn't as high as nine hundred—he had only collected four hundred mental incarnations. "Huh? It seems I can still continue cultivating!" Su Yuan unexpectedly discovered that even with only four hundred Taiyi, he could still continue comprehending the eighth level of the Mind Tower. He quickly understood: precisely because his foundation from previous levels was too solid, the seventh level's requirements could be lowered. After building the seventh level of the Mind Tower, the violent mind sea area decreased by one-fifth, representing his subjugation of inner turbulence and reaching a higher level of mental control. However, reaching the eighth level of the Mind Tower, merely constructing the tower body became difficult and obscure, estimated to require several hundred years. Su Yuan considered this too slow. Currently, Su Yuan had been in the cultivation acceleration state of [Balanced Work and Rest]. After six activations, it could enhance cultivation effects by a million times. But he still felt the acceleration multiplier was limited, making the speed not particularly fast. Su Yuan then activated the [Balanced Work and Rest] entry two more times, increasing cultivation effects by another hundred times, raising the originally activated cultivation effects to a hundred million times, and reducing cultivation time from three thousand years to thirty years. Three years later, the eighth level of the Mind Tower was successfully built. This level required ninety Great Luo Golden Immortal minds! Su Yuan thought for a moment and placed Su Ji's mental incarnation inside. Surprisingly, the Mind Tower actually accepted it. The entire eighth level of the Mind Tower had only one Great Luo-level mental incarnation supporting it—extremely shabby, but at least there was one existence, representing preliminary completion of this level. His Law of Mind elevated to the Great Luo level. In the mind sea, pure seawater immediately occupied ninety percent, with violent seawater and dead seawater each remaining at only five percent. Su Yuan felt his mind clear and his soul become pure, with cultivation efficiency increasing by several tenths! His soul cultivation improved significantly, and his control over his physical body increased by several tenths. His overall strength doubled. This effect was astonishingly impressive. Su Yuan had to admit that this inheritance was truly incredible. If he had explored this himself, the time required would absolutely be ten thousand times longer! And this was just the Law of Mind alone. If he formally entered the Great Dao of Mind! The effects would absolutely be extraordinarily abnormal. But Su Yuan didn't plan to follow the Great Dao of Mind inheritance path—this was someone else's trodden path that might have pitfalls. So he directly focused on comprehending the Law of Mind, planning to later integrate the Law of Mind into the Star Laws, making it part of his own Starry Dao Road. Su Yuan continued from the eighth tower level foundation and began comprehending the construction of the ninth tower level. This comprehension took ten years, during which Su Yuan forcefully built the ninth tower level. The Law of Mind also elevated to a level capable of independently blooming twelve-petal Great Dao Golden Flowers—essentially the peak Great Luo Golden Immortal level. As long as he placed and suppressed a Mixed-origin Golden Immortal's mind within it, his Law of Mind could elevate to the Mixed-origin Golden Immortal level. Unfortunately, no Mixed-origin Golden Immortals had fallen in the Three Realms yet. Su Yuan then spent twenty years integrating the Law of Mind into the Star Laws. The comprehension progress of the Star Laws finally increased again, rising from thirty-one-petal Great Dao Golden Lotus to thirty-two-petal Great Dao Golden Lotus level, only four petals away from the thirty-six-petal golden lotus. Only then did Su Yuan emerge from seclusion. On the Heart Refinement Path. Zhuge Tao, ranked first, had reached the five thousand five hundred li position over thirty years, while Sima Nan, ranked second, still lingered around the four thousand two hundred li place. During this period, Su Yuan's Law of Mind improvement also enhanced his resistance to the Heart Refinement Fire on the Heart Refinement Path, so he still closely followed Sima Nan, reaching the four thousand one hundred li position. As if sensing Su Yuan's gaze, Sima Nan looked over. His eyes no longer held the previous frivolity but carried a calm and aloof temperament. Su Yuan's heart tightened—indeed, this guy had been pretending all along! Perhaps the only mistake was losing the top-grade acquired spiritual treasure to Su Yuan, which clearly exceeded Sima Nan's expectations and might have genuinely broken his composure for a while. Now he had obviously recovered. Sima Nan withdrew his gaze, waved his hand, and a treasure appeared around him for protection. Then he sat cross-legged on the spot and began assaulting the Mixed-origin mental state. During this period, Sima Nan had also been tempering his mental state. Decades of tempering on the Heart Refinement Path finally brought Sima Nan's mental state to the Mixed-origin Golden Immortal perfection level. But this level was insufficient to secure first place in the second stage, so he unhesitatingly launched his assault on the Mixed-origin mental state right on the Heart Refinement Path! His consciousness entered the depths of his own mind, arriving within his own mind sea. But this level was insufficient to secure first place in the second stage, so he immediately launched his assault on the Mixed-origin mental state right on the Heart Refinement Path! This was the Eternal Heart Island. Once successfully condensed, his mental state would reach the level of eternal stillness, impervious to all methods. Initially, forming the general outline proceeded smoothly, but soon black energy appeared out of nowhere from all directions, transforming into various weapons that obstructed the heart island's condensation. Each weapon striking the heart island caused significant damage, making the newly condensed heart island fragments revert to seawater and return to the mind sea. Sima Nan attempted several times but found he couldn't handle these weapons immediately. So he shouted toward the sky: "Ancestral Master! Ancestral Master, please stop! I'm your disciple's disciple—please show mercy!" A Heavenly Demon took form, and a pale version of Sima Nan appeared above the heart island. He looked at Sima Nan with a strange expression: "You're also my disciple's disciple?" "Correct! I'm Sima Nan, having acknowledged the Demon Lord as master. I can open my memories to you—I'm absolutely not deceiving you!" "Heh, memories can be fabricated! Useless!" The Heavenly Demon Sima Nan shook his head, "Do you have any token from the Demon Lord?" Sima Nan hesitated at this: "Originally there was a weapon, but... but it was lost!" "Heh!" The Heavenly Demon laughed mockingly, "If you were the Demon Lord's successor, losing the token means you no longer are, let alone the fact that you never were from the beginning!" Sima Nan immediately said: "I truly am! I have the Demon Lord's inheritance technique—I cultivate the 'Twenty-Three Demon Swords'!" "Heh!" The Heavenly Demon laughed mockingly, "If you were the Demon Lord's successor, losing the token means you no longer are, let alone the fact that you never were from the beginning!" The Heavenly Demon looked at how the other party didn't possess even one percent of the Demon Lord's temperament and found it highly amusing: "Where did you steal this inheritance from? Very well, since you attempted deception, I'll increase your trial difficulty by two times as punishment. I hope you can maintain your mental state after failing your mental breakthrough, otherwise the Demon Realm will lose one of its talented individuals!"