The Hehuan Sect cultivates alchemy; my senior sister helps me refine alchemy throughout the world.

Shen Yifei walked up to the alchemy room where Jin Lian was being held. "Master Jin, are you getting used to being in there?"

Jin Lian roared from inside, "Shen Yifei! You fucking let me out! I'll fight you to the death!"

"A decisive battle to the death? Haha... Master Jin, you're just a piece of meat in my furnace now. You still want to fight me to the death? I advise you to honestly hand over the incantation for the Netherworld Cold Flame, and I might consider letting you die a quick death."

After saying this, Shen Yifei suddenly felt that the words sounded familiar. Wasn't this the same kind of threat that Ye Qianqiu and Lu Ya had used to threaten him?

Now that I'm using it to threaten Jin Lian, have I become a great villain?

"Dream on! You want to learn the Netherworld Cold Flame? No way!" Jin Lian continued to roar.

Shen Yifei wasn't angry with him. "Brother Jin, we're not in a hurry. Take your time to think it over. I have plenty of time. Tell me whenever you've figured it out, and I'll send you on your way."

He turned and walked over to Xinghe, where the little girl was studying the Soul-Locking Bell, turning it over and over for a long time, her little brows furrowed.

"Xinghe, how is it? Can it be modified?"

"Brother, it can be modified, but it will take some time." Xinghe raised her head. "The restrictions on this Soul-Locking Bell are very complex. I need to fully understand them before I can start modifying it. It will probably take three days."

"Three days? Okay, that's enough time." Shen Yifei calculated the days; there were still ten days until the full moon, plenty of time.

What he lacks now is the Netherworld Cold Flame. Without it, he cannot refine the Soul Pill, and his plan cannot be implemented.

It seems I should try going to my third sister; maybe she can provide some clues.

Shen Yifei thought of his third sister, that mysterious and powerful woman. Since she even looked down on that old thing, the Soul Devouring Demon God, she must know about the Netherworld Cold Flame.

He exited the Cauldron of Myriad Things, gave Liu Mengli some instructions, and then transformed into a streak of light, flying towards the direction of the Cold Ruins.

When they arrived at the Cold Ruins, it was broad daylight; there was no full moon, let alone a blood moon.

Shen Yifei could only wander around the icy plains on the outskirts of the Cold Ruins, shouting at the top of his lungs, "Third Sister! Third Sister! Help! Something terrible has happened!"

After shouting for a long time, all I heard was my own echo and the howling wind.

"Sigh... I wonder if Third Sister will be like Ninth Princess, only appearing after the full moon?" Shen Yifei muttered.

Shen Yifei was feeling somewhat disheartened when suddenly, his third sister's voice came from behind him, "Are you trying to call back your soul at the top of your lungs...?"

Shen Yifei turned around abruptly and saw his third sister standing not far behind him, still wearing a blood-red dress, arms crossed, glancing at him sideways.

"Third Sister, you've finally come out!" Shen Yifei quickly went up to her, his face beaming. "I've been missing you, haven't I?"

"Miss me? Hmph, you only come here when you need something. Tell me, what trouble have you run into this time?" Third Sister saw right through him.

"Third Sister is brilliant!" Shen Yifei gave a thumbs up. "I captured Jin Lian, the Soul Envoy under the Soul Devouring Demon God, the one who specializes in refining Soul Pills. I want to refine him into a highly nourishing Soul Pill. However, refining Soul Pills requires a strange fire called 'Netherworld Cold Fire,' which I don't know how to use."

"Netherworld Cold Flame?" Third Sister raised an eyebrow. "That thing was created by that Soul Devourer guy, specifically for refining Soul Pills. If you want to learn it, you'll have to go to that guy himself and get the incantation."

Shen Yifei said with a bitter face, "Third sister, please be kind and give me some pointers? You and Soul Eater are old acquaintances, so you must know the incantation for that fire."

The third sister stared at him for a long time, her blood-red eyes revealing no emotion. After a while, she suddenly laughed, a seductive laugh that sent chills down Shen Yifei's spine.

"Kid, you know how to seize an opportunity. But you guessed right, I actually do know the incantation for the Netherworld Cold Flame."

Shen Yifei's eyes lit up. "Really? Third Sister, tell me quickly!"

"Telling you isn't impossible," the third sister said slowly, extending a finger and tapping his chest. "However, you have to agree to one condition."

"What conditions? Don't mention one, even a hundred, as long as I can do it, I won't hesitate!" Shen Yifei patted his chest and guaranteed.

"As for the conditions, I haven't thought them out yet. I'll tell you when I do. Don't worry, I won't send you to your death, nor will I ask you to do anything immoral."

Shen Yifei hesitated for a moment. This woman had a mysterious background and unfathomable strength. If she made a request that he couldn't fulfill, it would be troublesome.

But then I thought about it again, and there was no better way at the moment, so I could only agree for now.

"Okay! Third Sister, I promise you. As long as it doesn't cross my bottom line, I'll agree to anything!"

"Tch, you still have a bottom line?" Third Sister scoffed, and without saying a word, she extended a slender finger and directly touched Shen Yifei's brow.

A cool sensation instantly surged from between his brows, directly into his sea of ​​consciousness. Immediately afterwards, a mantra was branded into the depths of his memory.

The incantation for the Netherworld Cold Fire is short, but extremely obscure and difficult to understand.

Shen Yifei closed his eyes and sensed it. He felt that the power contained in the incantation was cold and strange, completely different from any other cultivation method he had ever encountered before.

"Alright, here's the incantation. Whether you can master it depends on your own comprehension." Third Sister withdrew her finger. "I'm going back to sleep now. Don't bother me unless it's absolutely necessary. Also, don't forget what you promised me."

After saying that, without waiting for Shen Yifei to thank her, her figure disappeared into the air like a bubble.

Shen Yifei stood still, eyes closed, carefully sensing the incantation of the Netherworld Cold Fire in his sea of ​​consciousness.

It was obscure, extremely obscure, and Shen Yifei's head was starting to ache from thinking about it.

"Never mind, let's go back first." Shen Yifei shook his head and turned to fly towards Black Reef City.

Back in Black Reef City, Shen Yifei plunged into the secret chamber, entered the Cauldron of Myriad Things, and began studying the incantation for the Netherworld Cold Flame.

This research lasted for three days and three nights.

For three days, Shen Yifei repeatedly recited the incantation, trying to condense the Netherworld Cold Flame in his palm.

However, three days passed, and apart from a faint chill emanating from his palm, not a single spark flew out.

"Is this incantation fake?" Shen Yifei asked, somewhat discouraged.

Xinghe was playing with the Soul-Purifying Grass inside the cauldron when she heard Shen Yifei's complaint and casually remarked...

"Brother, since the Netherworld Cold Flame is used to refine the soul, perhaps it is a flame generated by burning the soul."

"Flames generated from the burning of the soul?" Shen Yifei was taken aback; he had never really thought of that.

However, Xinghe's words do make some sense.

Shen Yifei concentrated a wisp of divine soul power in his right palm and then guided it with an incantation.

Soon, a cool sensation flowed into his palm through his meridians, intertwining with the power of his soul.

Then, he felt a coolness in his palm.

Looking down, he saw a cluster of pale blue flames dancing in his palm.