Siyou and Siming grew up in the Underworld. They were born with noble bloodlines and cultivated extremely quickly. In particular, her brother Siming was born with the Xuanming Body and later became the God of Slaughter in the Underworld. Almost no one could survive under his command, so he was known as the Ghost Slayer Venerable.

Everyone knows that the Ghost Slayer Venerable is highly skilled, and few in the Underworld can match him. He has almost no weaknesses. The only person he cares about is his own sister, who shares the same mother.

However, the people of the underworld, in order to eliminate everything beyond their control, decided to strangle Si Ming. So they joined forces to set a trap, pretending to capture his own sister and then using her to threaten him.

Just then, Si You was trapped in another place and disappeared without a trace.

Concerned and confused, Si Ming disregarded the truth of the matter and went alone to rescue Si You. However, on this trip, his soul was torn apart by the Soul-Destroying Array and he died on the Burial Soul Slope, leaving only an empty shell.

If Jiang Xun hadn't arrived in time, even Si Ming's physical body would probably be gone.

It was because of this incident that Si You developed a different kind of trust and dependence on Jiang Xun.

In order to avenge her brother, she used all of his power to support Jiang Xun. Fortunately, Jiang Xun did not disappoint her and wiped out those who had killed her brother.

...

A gentle breeze blew in from outside the window, causing a few strands of her hair to flutter in the wind. Unconsciously, a glint of water seemed to flash in her eyes, but it disappeared in the next second.

"Tell me, if I hadn't been trapped back then, would my brother have survived...?"

Lu Fuyue remained silent; the deed was done, and she could not answer the question.

Whether one is a human cultivator or a ghost cultivator, once the soul is gone, then it is truly gone, and even the legendary Immortal-grade Soul-Returning Pill cannot revive it.

She didn't believe Si You was unaware of this.

Just then, Si You suddenly laughed, "Don't worry, I'm not crazy."

"How could I be crazy?"

She slowly got up and walked behind Lu Fuyue. Suddenly, her aura changed, and she formed a hand seal to cast a spell. Instantly, the light in the entire room dimmed, and an entrance with no end in sight appeared on the wall.

Si You walked towards the entrance: "Come on, as long as you stay here and refine that kind of pill for me, I can send you out of the underworld safely as a condition for the successful refinement."

"I can guarantee that neither that old ghost in the River of Oblivion nor that person in the Netherworld City will touch you in the slightest."

Lu Fuyue's eyes narrowed slightly. As expected, Si You's purpose was not simple. She stood up, looked up at Si You's retreating figure as she disappeared into the entrance, and said calmly, "What if I can't refine it?"

Si You paused for a moment, then turned to look at Lu Fuyue. "Don't worry, you'll be able to refine it."

Lu Fuyue lowered her eyes, stood there for a moment, and finally decided to follow them inside.

...

As soon as she entered, the light outside vanished instantly, and the entrance disappeared as well. Lu Fuyue noticed the change behind her, paused for a moment, and then continued walking forward without hesitation.

A moment later, Lu Fuyue finally saw Si You's figure at the end.

Si You stood with her back to her beside an ice bed, her hand trembling as she reached out to touch the man lying on the ice bed, dressed in a white undergarment.

"Brother, Ayou has come to see you. Do you miss Ayou...?"

Lu Fuyue stopped and stood quietly watching everything, her eyes calm.

As her cultivation level increased, she could feel her emotions towards her surroundings gradually disappearing. Others might see her as cold-blooded and indifferent, but that was the truth.

For example, when she saw this scene, she felt nothing at all, and even objectively analyzed that if Si Ming had been able to calm down back then, perhaps none of this would have happened.

At this moment, Si You's voice returned to its previous calmness, "Fairy Lu, I have prepared the materials needed for alchemy. You only need to refine it." She squatted beside the ice bed, resting her head on Si Ming's stiff arm, as if only in this way could she feel her brother's presence.

Upon hearing this, Lu Fuyue looked up and saw an alchemy furnace and countless jade boxes emitting a faint medicinal fragrance on an altar not far away.

She walked over and casually opened one of the jade boxes. Instantly, a strong spiritual energy surged out of the jade box, and a white light flashed, revealing a pure spiritual herb without any other colors.

She was slightly taken aback; it was actually an eighth-grade Rejuvenating Herb… Could it be… that she wanted to revive Si Ming…

But that's simply impossible.

Lu Fuyue turned to look at Siyou, who had just calmed down.

Their gazes met in mid-air, and a heavy atmosphere filled the air for a moment.

Si You smiled faintly, stood up and walked to Lu Fuyue's side, standing shoulder to shoulder with her. "How are these spiritual herbs?"

Lu Fuyue thought for a moment and then asked, "Are you sure you want me to refine the Rejuvenation Pill?"

The Rejuvenation Pill, as its name suggests, can bring back the soul. As long as the body of a cultivator after death is nourished for ten thousand years with the heart blood of their closest blood relatives, and then the Rejuvenation Pill is used, the soul that has dissipated between heaven and earth will gradually gather back together.

However, Si Ming is a ghost cultivator, and the Soul-Returning Pill only works on human cultivators, so it is impossible to gather his soul. Even if it is forcibly gathered, it will only result in a mortal with a damaged soul.

Si You's smile faded little by little. A struggle flashed in her eyes, but then disappeared. After a long silence, she finally spoke, word by word: "Fairy Lu, this is not something you can worry about. You should focus on how to refine the Rejuvenation Pill."

"I suppose you don't want to stay in the underworld forever."

Lu Fuyue's eyes darkened slightly, and her voice turned colder, "Is Your Highness planning to threaten me?"

The Rejuvenation Pill can only be refined using spiritual power, but the cultivators of the Underworld are all ghost cultivators who cultivate yin power. No matter how strong their alchemy skills are, they cannot refine it.

As for why Si You didn't seek out those well-known alchemists in the cultivation world, but instead came to her, a cultivator with no reputation, Lu Fuyue probably guessed the reason.

It's just that people from the underworld can't leave the underworld, and the famous alchemist from the cultivation world won't come here, so she probably only approached her as a last resort.