After all, the Rejuvenating Pill, being a rankless pill, is not something that just anyone can refine.

Si You's gaze fell on Lu Fuyue, and she suddenly smiled, "Threat? Not really, it's more like a transaction."

"Since you helped me refine the pills, I'll tell you another secret."

"Do you know why Jiang Xun treated you so specially even though he had never met you before? It's because he spent some time by your side when he was practicing the Reincarnation Technique."

"Fairy Lu, you're so clever, you must have guessed his identity, right?"

Lu Fuyue's expression changed slightly, Jiang Xun...

A name suddenly popped into her mind. Could it be... he is... Jiang Huaixu...?

Si You noticed Lu Fuyue's odd behavior and smiled. "It seems you've guessed it. Actually, I didn't expect that while investigating his identity in this reincarnation, I would unexpectedly learn some things about you."

"As someone who can refine pills without any rank at the Golden Core stage, I suppose the Rejuvenation Pill, which is also a pill without any rank, is no problem for him."

Lu Fuyue snapped out of her daze, looked up at her, and then shook her head. "There are differences between unranked pills. It's not something I can just refine whenever I want. Besides, the Rejuvenation Pill is a kind of pill that goes against the laws of nature. Whether you refine it or use it, you have to pay a huge price."

"I'm afraid I can't refine this pill."

Si You didn't seem surprised when she heard this. If the Rejuvenation Pill were so easy to refine, she wouldn't have had to wait so many years. It was understandable that Lu Fuyue would refuse.

"Fairy Lu, don't be so quick to refuse. What if I said that I would bear all the consequences and all the costs, and all you need to do is successfully refine the pill? Once it's done, I will let you return to the cultivation world safely."

Lu Fuyue remained silent for a long time. "How will you bear the consequences and the price?"

You must understand that forcing something that shouldn't exist is going against the laws of nature, and you could easily be destroyed.

Si You was taken aback, seemingly not expecting Lu Fuyue to care about this issue. But then she thought about it and figured she was probably just afraid that Lu Fuyue would lie to her.

"Don't worry, I, Siyou, always keep my word. Since I promised you, I definitely won't cheat you."

After saying that, she steeled herself, suddenly raised her hand and clawed at her own heart. The next second, a bloody heart was pulled out of her chest.

Instantly, Si You's face turned deathly pale, and beads of sweat appeared on her forehead. She paused for a moment before speaking:

“Our clan has always kept its word. If you don’t believe me, I can give you my heart. With this heart, you can control my lifeline… and even control me.”

Lu Fuyue looked at the still-beating heart in Si You's hand, and her pupils suddenly contracted.

The Phoenix Legacy mentions that in the underworld there is a great ghost called Si, who is a primordial ghost form born from the primordial Yin energy of the underworld over tens of thousands of years. They are usually twins, with the one who takes human form first being male and the one who takes human form later being female.

They are incredibly powerful with almost no weaknesses, but they place great importance on bloodlines and will never abandon their partner. In fact, most of their deaths are to save the other party.

The heart is the lifeblood of the demon. Once you obtain its heart, if the demon breaks the agreement between you and it, you can completely control the demon through the heart.

Because she had lost her heart, Si You's face turned completely pale. Even though the bloody hole in her chest was gradually closing under her powerful yin energy, she still became somewhat weak.

She clutched her still-bleeding chest, steadied herself, and walked step by step to Lu Fuyue. Then, she transformed the heart in her hand into a red stone and placed it in front of Lu Fuyue. "Now, do you believe me?"

Lu Fuyue lowered her eyes and looked at the red stone. After a long while, she reached out and took it, then put it away. "Okay, I promise you."

"However, I cannot guarantee when I will be able to refine the Rejuvenation Pill. Moreover, I must return to the palace to refine it."

Si You breathed a sigh of relief when she saw Lu Fuyue accept the red stone. "Okay."

The reason she was asked to stay here to refine pills was simply because they were afraid she would go back on her word. But now that Lu Fuyue has taken the blood-red stone that turned out of her heart, it means that her previous contract with Lu Fuyue is complete. If Lu Fuyue goes back on her word, then she will be the one who dies.

...

After leaving the underworld market, Lu Fuyue quickly returned to her courtyard. The day after tomorrow was the day she would go to serve Jiang Xun, so she turned around and entered her spatial dimension to begin studying how to refine the Spirit Recovery Pill.

Like the Phoenix Life Pill she had refined before, the Rejuvenation Pill was a pill without a grade. The lack of a grade actually represented its special nature, making it extremely difficult to refine and use.

Lu Fuyue was able to successfully refine the Phoenix Life Pill because her true form is a phoenix, coupled with her exceptional talent in alchemy.

But this time, the Spirit Pill is different. If she makes even the slightest mistake in circulating her spiritual energy, all the spiritual herbs will be wasted. Moreover, with her current cultivation level, it is still a bit of a stretch for her to refine the Spirit Pill. She can only increase the chances of success by relying on the power of the Spirit-Replenishing Fruits in the space.

After entering the space, Lu Fuyue first took a basket to the spirit fruit garden and picked some top-grade spirit-replenishing fruits. Then, she took the spirit herbs that Siyou had given her for refining spirit-restoring pills and soaked them in the spirit spring for a while. Only when all the spirit herbs had recovered to their optimal effect did she pick them up and put them into the medicine basket next to her.

The refining of this Rejuvenation Pill is different from other pills; she must be extremely careful, otherwise she will only waste these rare spiritual herbs.

Lu Fuyue carried the things she had just prepared to the pavilion in the center of the lake and arranged them one by one on the stone table.

After everything was ready, Lu Fuyue adjusted the spiritual energy in her body and then circulated her cultivation technique to begin refining pills.

A moment later, the alchemy furnace slowly floated in mid-air under Lu Fuyue's spiritual power. She lowered her eyes and gently blew on the Phoenix Red Lotus Karmic Fire in her hand, and a golden-red flame ignited at the bottom of the alchemy furnace.

Lu Fuyue formed a hand seal, and the azure spiritual energy created a lotus mark in mid-air. Then, she gradually controlled the temperature of the Phoenix Red Lotus Karmic Fire.

Seeing that the temperature of the alchemy furnace had reached its optimal level, Lu Fuyue waved her right sleeve, and a stream of spiritual energy enveloped the spiritual herbs and entered the alchemy furnace.

Time passed slowly, and the pills in the alchemy furnace began to take shape. However, at this time, the spiritual energy that Lu Fuyue had just recovered began to deplete, and her face turned pale.

The alchemy furnace suspended in mid-air swayed a few times as a result, but fortunately Lu Fuyue adjusted her spiritual energy in time, preventing it from exploding.