Yu Zichong's spirit was trapped in a narrow corner, flailing about like a fly with its wings folded, constantly bumping into walls. Every time it tried to break free and fly outward, a thick black liquid would push it back halfway, and behind it came a deadly cold glint—repeated cuts that constantly struck the luminous sphere, dimming its green glow with each blow. Though the relentless sword attacks had weakened his spirit considerably, he no longer cared much. What truly left him helpless was the relentless erosion by that black liquid. Since being splashed by it, he had felt a constant tingling, numbness, and weakness spreading across his spirit, with his remaining spiritual power gradually worn down. Most critically, the liquid impeded his spellcasting, causing him to repeatedly fail in casting spells—seemingly imprisoned. "Why have you killed me? Why?" ... Facing Han Li's cold and unyielding actions, intermittent cries of Yu Zichong, hoarse and filled with deep resentment, echoed from the light sphere. Yet Han Li said nothing, merely swinging his sharp blade with increasing speed as a response. Soon, Yu Zichong's voice gradually faded, growing weaker and weaker, until only faint murmurs remained, and then silence settled completely. Han Li did not immediately cease his attacks. Instead, he continued to strike the barely visible spirit that lay upon the ground—only faintly illuminated by candlelight—with a series of over a dozen sword blows, until he could no longer extinguish the final traces of green light. Only then did he withdraw his soft blade, wrapping it securely around his waist. Only then did Han Li speak coldly: "I have never collaborated with someone who swears by their own parents. Nor will I follow the example of Mu Doctor and place my trust in your mere assurances—a small man's promises." With a cold gaze at Yu Zichong's final spirit flame, Han Li turned without hesitation and approached the stone gate, pushing open the heavy door. As the gate swung open, several beams of bright sunlight streamed in, illuminating the remaining spirit essence. Instantly, the faint green glow flickered and vanished with a soft "puff," dissolving into delicate wisps of pale blue smoke that faded into the air. Thus, the only trace of Yu Zichong left in the world was completely erased by Han Li, leaving no means by which anyone could trace or recall his existence. Han Li's awareness of the spirit's vulnerability to light—though he had only recently learned it—was first awakened by Mo Doctor's early action of extinguishing several lamps upon entering the room. Otherwise, he would have been powerless against this seemingly indestructible final threat, constantly anxious and vigilant. Yet, despite this effortless elimination of Yu Zichong's spirit, Han Li's pre-prepared jar of the Seven-Toxic Water remained undiminished. This toxin, originally refined by Doctor Mo from the Five-Toxic Waters, has been further enhanced with a new ingredient—the "Earth Mushroom Bloom." This herb is not only highly toxic to ordinary people but also poses significant challenges to the immortals' spiritual essence. Precisely because of this, Yu Zichong has consistently been unable to smoothly channel his spells, and his spiritual core has been easily extinguished. As for Han Li's initial decision to spray the Seven-Toxic Waters directly onto Yu Zichong's spiritual essence, it stemmed merely from the influence of various legends—wherein, nearly all demons and spirits were said to fear fluids such as chicken blood or black dog blood. Han Li, inspired by this, treated Yu Zichong's spiritual essence as if it were a ghostly being. How, then, would Yu Zichong react beneath the earth, if he were aware of this series of fortunate yet mistaken events—would he not be so enraged that he might once again expel blood and perish? Han Li naturally had no idea about all these coincidences. All he knew was that even if the poison failed to take effect, as soon as he opened the door, the other's spirit would inevitably be extinguished. Precisely for this thorough consideration, he had resorted to a merciless, decisive attack against Yu Zichong. Now, finally free, he no longer had to live in constant fear, with a knife pressed against his neck, ready to die at any moment. A towering figure drifting nearby the stone gate suddenly came into view—none other than the giant known as "Tie Nu." Han Li's expression instantly grew grim. As soon as he saw the figure, he felt a dull ache spreading across his shoulders, as though the weight of his oversight had returned. He had made a serious mistake once again—having failed to pay attention to this giant, and forgotten to inquire from Yu Zichong's immortal consciousness about the giant's origins and vulnerabilities. Yet, a measure of reassurance settled upon Han Li. The giant seemed utterly indifferent to what was unfolding within the stone pavilion, merely pacing back and forth outside, strictly adhering to the watchful commands of the late Doctor Mo, and never once glancing through the open stone gate. Han Li furrowed his brows, sensing that the situation was now becoming increasingly difficult. Though the giant appeared rather dull and unresponsive, relying solely on rigid obedience, Han Li found such a figure particularly challenging—because he simply could not persuade him through words to lay down his arms and seek peace. Yet once the struggle began, Han Li was no match for his opponent. The only thing that could potentially threaten the giant was the hollow cylinder of poison water. Han Li moved steadily back and forth across the room, tirelessly thinking of a way to subdue the giant, but for a while, his mind remained as tangled as a bundle of ropes, utterly without direction. By chance, his eyes fell upon the body of Mo the physician. Suddenly, an idea struck him. "Perhaps we can find some means to counter the giant on the body itself," he thought. He glanced out the door and saw the giant still pacing tirelessly, showing no intention of approaching. With this, Han Li felt reassured and stepped forward in a few strides to the body of Mo the physician, extending his hands without hesitation, and began carefully examining every inch of the corpse.