Among these buildings, many high-ranking flying spirits of varying appearances moved in and out continuously, creating a lively scene. However, when the sky suddenly darkened and Yue Long appeared riding the rushing wind, all the flying spirits in the basin were startled. Regardless of what they were doing, they instantly fell to their knees and paid homage. "Friend Han, this is one of my seven abodes, constructed in a rather unique manner. Friend, let us go down together," said Yue Long, pointing remotely toward the massive tower below after emerging from the wind. Han nodded in response, and gently descended toward the great tower. Yue Long then blurred slightly, rushing directly into the entrance of the tower's upper level, carrying a current of black wind. After a cup of tea's time, Han found himself in a splendidly furnished hall, seated on a crimson-gold chair, facing the opposite side. Yue Long sat in another chair of the same hue, holding a jade-green wine cup in his hands, and spoke warmly, "Friend Han, this Hu Yuan wine is brewed from forty-nine kinds of spiritual herbs—seven times seven. After drinking it, not only does it restore one's spiritual power, but it also clears the mind and invigorates the spirit. It's truly a rare spiritual wine." "Indeed a fine brew—your good fortune in tasting it is no small thing," Han nodded, lifting his cup and sipping lightly, then smiled with approval. "If you like it, why not have a few more glasses?" Yue Long beamed, eyes bright with enthusiasm. "Then I shall be most generous," Han smiled, finishing off the entire cup of spirit wine in one go. With a simple gesture of his hand, he then summoned the wine pitcher from the table before him and poured himself another cup. "Ha ha! As long as Friend Han enjoys this wine, I'd also like to introduce you to another treasure—something rarely found beyond these these halls. I hope you'll take a moment to admire it." "Yue Long smiled and lightly clapped his hands. With a crisp 'snap,' footsteps immediately echoed from outside, and three female servants of the Feilings race entered, bowing low and standing in a neat row before Han Li. Han Li's gaze flickered slightly—neither lingering on the youthful, blossoming faces of the women nor on their graceful postures—but instead settled on the delicate silver trays they each held. On each tray rested a crystal slab of palm-sized dimensions, each with a distinct hue: one deep yellow, one pale blue, and one glowing a vibrant crimson, like flames. As Han Li's spiritual awareness swept over them, his expression grew noticeably stirred. The three slabs emitted distinct essences—earth, fire, and water—each pure and refined, surpassing even the finest spiritual stones in purity." "Han brother, what do you think of these Ji Yuan Crystals? They are all materials personally refined by me. Whether used to craft artifacts or as substitutes for spiritual stones, they are truly remarkable." Yue Long had been intently observing Han Li's expression, and upon seeing his surprise, chuckled softly. "Ji Yuan Crystals! Not a naturally occurring substance, but one refined by you yourself." Han Li's face truly changed. "Indeed, these materials were only achieved through a secret technique I developed. I wasted countless rare raw materials and suffered numerous failures, yet I find these three results to be immensely worthwhile." Yue Long spoke with a touch of pride. "A secret technique?" Han Li's eyes narrowed slightly. "Haha, Han brother, please take your time to carefully examine these items first. I'll explain everything in detail later." Yue Long spoke with a hint of mystery. "Very well, then, I shall not hold back." Han Li nodded, and with one hand casually reached forward. The pale blue crystal slab trembled slightly on the silver plate before rising into the air and settling steadily into his hands. He slightly inclined his head, and with a soft "pffft," a crystalline filament shot forth from between his brows, flashing into the crystal slab and vanishing. At the same time, he slowly closed his eyes. Yue Long watched the scene with a warm, smiling expression, showing no intention to interrupt. After a while, Han Li raised his brow slightly, opened his eyes again, and the crystalline filament between his brows flickered and dissolved into the crystal slab. "What a refined celestial energy! The spiritual essence within appears to be at least four or five times that of a first-class spiritual stone—far purer than ordinary stones. However, the internal structure is somewhat unusual, with innate spiritual patterns embedded within. When used to craft a magical artifact, it should generate a unique form of divine technique. I'm just not sure yet about its durability," Han Li said, speaking with a tone of serious anticipation. "Brother Han truly possesses a keen eye—having already revealed most of the unique qualities of this Jiyuan Crystal. As for its tenacity, Master, you may test it yourself." Yue Long's eyes brightened, and he clapped with a smile. "Since you've said so, then I shall give it a try." A faint expression of surprise passed over Han Li's face, and then, with a single breath, a strand of silvery hair shot out, whistling through the air, swiftly circling the crystal slab in his hand before darting back. The pale blue crystal glowed brightly, and a shallow sword-like mark appeared on its surface. As a series of gentle blue light halos flashed around it, the mark gradually faded, vanishing completely within seconds. "Rejuvenating and restoring vitality—this material exhibits an extraordinary regenerative effect!" Han Li exclaimed, suddenly. "Brother Han has immediately recognized this regenerative property—truly a distinguished figure of your reputation. Indeed, not only this slab, but the other two Jiyuan Crystals also possess this remarkable quality." Treasures crafted from this material will, unless their essence is completely reduced to ash, naturally repair themselves over time—provided sufficient time is allowed. While some soul-bound treasures also possess self-repairing properties, such abilities require continuous cultivation by the owner using true energy and considerable time investment, far surpassing the capabilities of those made from high-energy malleable materials. Thus, their inherent value speaks for itself. A slight expression of surprise flickered across Yue Long's face, yet he spoke slowly. "Materials endowed with high-energy malleability are exceptionally rare—not only in the spiritual realm, but even across other realms. Moreover, the fact that this item withstands my swordlight strike without cracking demonstrates its outstanding resilience. Is it merely to have me offer a mere commentary that you have brought forth this extremely rare polar crystal so suddenly?" Han Li gently held the crystal slab in his hands, then turned to his counterpart with thoughtful reflection. "You speak with remarkable directness. Then, I shall cut to the chase as well." I have invited Brother Han here indeed with a matter of request in mind. Once this matter is settled, I shall present these three pieces of Jixuan Crystals as my reward—how does that sound to you? Yue Long was momentarily startled, but after blinking a few times, immediately composed himself and said, "Even a single piece of Jixuan Crystal is quite valuable. To offer three such pieces, your request must be quite substantial. Please go ahead and state your matter, and I shall then decide." Han's brows furrowed slightly as he glanced at the crystal slabs in his hands, then calmly replied, "This matter may pose some difficulty for an ordinary Stage of Great Perfection, yet for a master of your caliber, it is nothing at all. I have spent great effort refining this Jixuan Crystal, precisely intending to use it as the primary material to craft a Five-Element Immortal Treasure capable of withstanding the next great celestial calamity. However, after several thousand years of dedicated labor, I have only succeeded in producing Jixuan Crystals of Water, Fire, and Earth attributes. To obtain the remaining two attributes—Wood and Metal—someone must assist me in this endeavor." "Han brother is undoubtedly the most suitable candidate," said Yue Long after a brief pause, speaking with ease. "Would you like Han to assist in refining the Jiyuan Crystal?" Upon hearing this, Han Li was genuinely surprised. "Indeed. I must confess to Han brother that refining the Jiyuan Crystal requires the combined power of elements from the heavens and earth. The first three types of crystals are manageable—though I've had several failures, I've still succeeded on multiple occasions. However, the golden and wooden types present a far greater challenge. The celestial and terrestrial energies drawn upon are so powerful that they exceed my ability to control and regulate. That is why I have come to seek your assistance." With a respectful bow, Yue Long spoke with sincere earnestness. "If the task merely involves helping to control these natural energies, then I am quite capable of stepping in. Nevertheless, I still have two questions that I would like to clarify with you." After a moment of thoughtful reflection, Han Li asked cautiously. "Please go ahead and ask, and I will answer without reservation." "Yue Long was delighted and spoke without hesitation. "Have we met before, friend? If you're seeking assistance, why not invite other acquaintances or close friends as well? Moreover, I will help regulate the celestial and terrestrial energies flowing down—shouldn't there be any unforeseen, great dangers? After all, these energies are ever-changing and profoundly powerful. Also, how can you be certain that I, Han, can produce polarized crystals of other attributes? Isn't it possible that I might fall short?" Han Li looked at Yue Long, a spark of insight flashing in his eyes. "So, Brother Han merely has some concerns about me. That's quite natural. If it were me, I would be even more cautious. But please rest assured—I can address all your concerns." After hearing Han Li's questions, Yue Long burst out laughing. "Ah, then I shall listen attentively." Han Li said calmly, his expression unchanged. "The first issue arises because my companion has not personally witnessed the Golden and Wood energies of the heavens and earth that I have summoned. These latter two heavenly forces are significantly more difficult to invoke than the first three, and their strength exceeds that of the earlier ones by several times—far beyond what a typical stage of attainment can withstand. I myself attempted it twice, but dared not try a third time. Though I have several close friends, none of them possess a level of cultivation or spiritual prowess comparable to mine, and thus, they are equally unable to withstand these two powerful forces. Moreover, the control over these celestial energies cannot be compensated for simply by increasing the number of people involved—it must be entrusted to a single individual to operate smoothly and effectively, which is precisely what the Jiyuan crystal enables." Yue Long's expression grew serious as he began to speak earnestly. "As for the second question, if I were to claim that there is absolutely no danger at all were too superficial. However, with adequate preparation, the risk of controlling the powers of heaven and earth can indeed be reduced to a minimum. At least, during the first two times Yue Xue attempted to harness the powers of metal and wood, he only encountered mild surprises, with no serious setbacks. As for the final question…" Yue Long paused slightly as he spoke.