The strange changes inside his body left William Clark rather baffled. None of this was subject to his will. However, after the yin fiendish energy dissipated, William Clark noticed that several of the seal script characters on the "tortoise shell" had become clearly visible.

  "Shu Zang!"

  Now, in William Clark's mind, aside from being round, the tortoise shell no longer resembled a compass in the slightest, because at the very center of the shell, the two seal script characters "术藏" had appeared.

  Surrounding these two characters, arranged in a ring, were twelve slightly smaller seal script characters, namely: "divination, geomancy, fate, physiognomy, dream interpretation, and selection of auspicious dates."

  "How... how did these things appear?"

  The changes in his mind felt dreamlike to William Clark. Having studied ancient texts and physiognomy with Old Preacher for several years, he naturally understood the meaning of "术藏."

  So-called "shu"—also known as shushu—was a key component of the Five Arts of ancient Daoism. Shushu used the theory of the mutual generation and restraint of yin-yang and the five elements to predict fortune and misfortune in nature, society, and human affairs, and was a major branch within the study of the Book of Changes.

  As for the character "藏" (zang), it refers to a compendium of classics: Buddhism has the "Buddhist Canon," Daoism has the "Daoist Canon," Confucianism has the "Confucian Canon," and the "Shu Zang" is a grand collection of Yi studies and the theories of yin-yang and the five elements, holding an extremely important position in ancient times.

  However, since the Republic era, Western learning has spread eastward, and scientific thinking has become mainstream. The arts of shushu, regarded as superstition, began to fall out of favor, and many once-popular shushu classics have now become rare.

  William Clark often heard Old Preacher lament that the Chinese people had not mastered the wisdom of their ancestors accumulated over thousands of years, yet spent their days worshipping the West and learning things like English. It was as if there was a treasure mountain hidden at home, but they insisted on going out to scavenge for junk.

  "Could it be... I can use the knowledge within the tortoise shell?" Staring at the characters on the shell, a thought popped into William Clark's mind.

  Since divination, geomancy, fate, physiognomy, dream interpretation, and selection of auspicious dates were the most common fortune-telling arts in the Shu Zang, seeing these terms together inevitably set William Clark's imagination running wild.

  But with only these words appearing in his mind and no method of application, it was like a dog biting a hedgehog—nowhere to start—leaving William Clark itching with curiosity.

  "There are six kinds of arts inside. I'll just focus on one and see if it works..."

  The yin fiendish energy had long since been cleared away, and William Clark couldn't be bothered to recite the "Duren Sutra" anymore. He calmed his mind and focused his attention on the two characters "divination" on the tortoise shell.

  "Hmm? Nothing's happening."

  Aside from the two hazy seal script characters, William Clark found nothing else, and couldn't help but feel a bit disappointed. Was his guess wrong? But then how did Old Preacher's life story appear in his mind earlier?

  "Eh, the color of these characters is a bit different from the others?"

  After studying the words "divination" for a while, William Clark suddenly noticed that among the twelve characters—six terms—four were a dull gray, while "geomancy" and "physiognomy" were faintly glowing.

  "Maybe only the glowing characters can be activated?"

  A thought stirred in William Clark's mind, and he focused his attention on the two characters for "geomancy." As soon as his consciousness touched them, the two characters suddenly dispersed, transforming into wisps of spiritual energy that poured into William Clark's eyes.

  He felt a cool sensation in his eyes, and when William Clark looked ahead, the scene before him seemed a bit different than before—there appeared to be more colors between heaven and earth.

  For example, the two-story building in front of him seemed to emit a faint golden glow in William Clark's eyes, while the houses on either side were shrouded in a dull gray, completely lacking in luster.

  But behind the house, there was a presence of yin fiendish energy, which had already begun to affect the residence. The two colors intertwined, creating a rather strange effect.

  "Facing south with a north-facing Li gate, water and fire in harmony, the Kan and Zhen directions are broad and tall—a sign of great fortune! The water point at the back door is an inauspicious star, bringing calamity and reducing descendants!"

  As William Clark observed the differences in his vision, several lines of text suddenly appeared in his mind. Then, the cool sensation in his eyes faded, and those words slowly disappeared from his mind as well.

  "Haha, so it really is like this! Isn't this a pair of feng shui eyes?" Having discovered the method to use the tortoise shell, William Clark laughed out loud in delight.

  If another child experienced this, they might have been frightened, but having studied feng shui and physiognomy since the age of five, William Clark was filled with excitement, as if he had just received his most coveted toy.

  "Heh, the two characters for physiognomy are glowing too. Doesn't that mean I can help people read faces in the future?"

  William Clark chuckled to himself, but the mysterious tortoise shell in his mind had vanished again, so he couldn't test it for now. Still, William Clark believed that as long as the shell remained, he would eventually uncover its secret.

  Since it was a secret, William Clark had no intention of telling anyone. Though young, he knew that if he mentioned the "tortoise shell" in his mind, people would either call him superstitious or think he was a little charlatan.

  "Little immortal, little deity, you... what's wrong with you?"