Chapter 1713: Six Desire Heavenly Demon Sutra

Zhang Fei sat cross-legged on the ground.

"Are you going to learn the Yin-Yang Cauldron Art now, Husband?"

"Yes." Zhang Fei closed his eyes and started learning the technique.

Huo Ling suddenly emerged from Zhang Fei’s body. "Are you sure it’s okay for our husband to learn the technique, Master?"

"You’ve been following him with me for a long time, so you should know his character by heart, right?" Feng Yao looked at Zhang Fei with a calm gaze. "Even though that technique is a forbidden evil one, I’m sure he will never be affected by it."

"I hope so."

With his comprehension, Zhang Fei managed to learn the Yin-Yang Cauldron Art in less than an hour. As soon as he used the technique, a black and white cauldron surrounded by demonic runes appeared behind him. Unlike other dual cultivation techniques, he could use it without dual cultivation, and the cauldron behind him was the key.

Zhang Fei opened his eyes and looked at the black and white cauldron behind him. "Ling’er, please help me find a beast."

"Alright." Huo Ling immediately disappeared from that place.

Within a few minutes, Huo Ling had returned to the place and thrown a female ox beast on the floor. "Do you want to use this beast to test that technique, husband?"

"Yes." Zhang Fei looked at the female beast and activated his technique. In that instant, black and white threads shot out from the cauldron, binding the female ox beast and pulling her inside. "Let’s see."

Moments later, the cauldron released black and white light, forming a Yin Yang symbol above it. Zhang Fei and the others could see half of the female ox beast’s body turning black and the other half turning white, with demonic runes covering it. "The cauldron won’t activate without a sacrifice."

"What’s special about the Yin-Yang Cauldron Art is that you can use it with or without dual cultivation, and the results will be the same." Feng Yao looked at the cauldron seriously. "If you use it without dual cultivation, the cauldron will process the sacrifice accordingly, and it will produce pills depending on the sacrifice. If you use it while dual cultivating with a woman, the results will be directly channeled into your body, so you can feel the results immediately."

"I never thought of using this technique with dual cultivation directly, and I prefer to use it without dual cultivation. If I use a male sacrifice, the pill will correspond to Yang, and the pill will correspond to Yin if the sacrifice is a female, right?"

"That’s right." Feng Yao nodded. "The pill produced is not a dual cultivation pill, and it contains the sacrifice’s vitality, qi cultivation, Yin or Yang essences, blood essence, and soul power."

Zhang Fei grinned. "If I use this technique in dual cultivation, only I will reap the benefits. If I use it without dual cultivation, I can share the pills with others."

After a few minutes, the female ox beast disappeared from the cauldron, and what appeared above it was a white pill. Zhang Fei immediately took it and examined it.

"This pill really contains the vitality, qi cultivation, Yin or Yang essences, blood essence, and soul power of the female ox beast." Zhang Fei summoned the Three-Eyed Sky Tyrant, Sha Huoyan, out from the beast space. "Try this pill, Huoyan."

Sha Huoyan felt something was off about the pill, but she knew that Zhang Fei would never harm her. She immediately swallowed the pill and dissolved it using her qi.

"How do you feel, Huoyan?"

"Hmm?" Sha Huoyan thought of the right words to describe the pill’s effects. "Master, the pill contains vitality, qi, yin essences, blood essence, and soul power, right? Although I don’t feel any significant changes in my cultivation, I do feel that some parts of me have undergone significant changes."

"Yes," Zhang Fei explained the pill’s effects to Sha Huoyan, but he didn’t tell her that it was made from a living sacrifice. "I’ll send you back to the beast space, and I’ll give you the same pill later, so some aspects of you will improve more quickly."

"Thank you, Master."

After sending Sha Huoyan back to the beast space, Zhang Fei deactivated the Yin-Yang Cauldron Art, and the black and white cauldron immediately disappeared on its own. "Although this technique is evil, I can use other sacrifices to use it, for example, those ordinary beasts, demon beasts, or demons."

"Everything is fine as long as you don’t use humans as sacrifices, husband."

Zhang Fei looked at Feng Yao and Huo Ling. "I will use humans as sacrifices in the future, but I will never use innocent people as sacrifices, and I will only use those who are truly evil."

"I don’t think that’s a problem." Feng Yao and Huo Ling nodded in agreement.

Zhang Fei looked at the last technique scroll, but he was thrown back as soon as he intended to pick it up. "What the hell is that?"

"This technique is different from the previous four techniques, husband." Feng Yao extended her right hand forward and sucked the technique scroll toward her. Unlike what happened to Zhang Fei, the scroll didn’t knock her back, but it did vibrate violently as it resisted her aura. "If you dare to challenge me, I will incinerate this scroll with my phoenix flames, and your existence will disappear from this universe."

The technique scroll instantly stopped shaking and no longer fought back against Feng Yao’s aura.

"Heh." Feng Yao snorted and opened the scroll, but a black shadow immediately came out of it. "As I thought, those people created you and instilled you in this technique."

Zhang Fei’s brows furrowed. "What is that black shadow, Yao’er?"

"This black shadow is the soul of this Six Desire Heavenly Demon Sutra."

"The Six Desire Heavenly Demon Sutra?" Feng Yao handed the technique scroll to Zhang Fei, and he immediately read it. "It is a notoriously forbidden dual cultivation technique, created by an ancient cultivator who sought to transform human desires into demonic cultivation power. This technique centers on the six desires—lust, greed, obsession, domination, pleasure, and possession—using them as fuel to corrupt both body and soul."

Feng Yao nodded at him. "If you use the technique on female cultivators, it will create Six Desire Demon Hearts in their hearts. They will experience constant indulgence in six desires, slowly eroding their sanity, and they will never be able to escape from you. However, this technique has huge horrific consequences, and those female cultivators will eventually turn into demons, so you must not use it carelessly."

"A dual cultivation technique that can transform living beings into demons, huh?" Zhang Fei muttered to himself. "It doesn’t just affect women; it affects men too, right?"

"It all depends on the gender of the user, husband. Since you’re a man, the effects will affect women. If a woman uses it, the effects will affect men."

Zhang Fei nodded in understanding. "Have you ever seen victims of this technique in the past?"

"Yes," Feng Yao created a qi screen that showed several women who were victims of the technique. "Can you see them? Their bodies and souls have been corrupted by that technique, and they’ve lost their sanity because of it. Only the user of that technique can control them, and they will attack everyone besides the user."

Zhang Fei took a deep breath, as the technique was extremely terrifying. "What are the long-term effects of this technique?"

"Those women will suffer cultivation regression, Qi deviation, broken meridians, loss of lifespan, and much more."

"In the end, those women will become crippled or die, right?"

Feng Yao nodded. "You can’t use this technique on all your wives, but you can use it on your enemies."

"Naturally, I don’t use such a terrifying technique on any of my wives," Zhang Fei said seriously. "Does that mean I’ll also have the Six Desire Demon Hearts if I learn this technique?"

"That’s for sure, but the effects will be different for you." Feng Yao immediately explained to him. "The Lust Heart is related to lust and the like. The Greed Heart will amplify your essence absorption rate. The Obsession Heart will bind their souls to yours. The Possession Heart can help you dominate their mentality. The Indulgence Heart will corrupt their emotions. The Domination Heart will suppress their wills, so they will submit to you completely."

"Such a terrifying technique." Zhang Fei rolled up the scroll and stored it in his system inventory. "I won’t learn it now; I’ll think about it first."

"Are you afraid of the effects of that technique, husband?" Huo Ling asked.

"Yes." Zhang Fei pulled her over and kissed her. "Even though I’m a demon, I still have my consciousness, and I should think twice about learning that technique. Since there’s nothing here anymore, we have to leave now, but where are we going next?"

"Follow me."

Within a few minutes, they had returned to the ruined library, and Feng Yao led them to another area.

"Hmm?" Zhang Fei looked around. "What kind of place was this in the past?"

"Look at them." Feng Yao pointed to several alchemy furnaces to the north. "Dual cultivation is inseparable from pills, and this place is a place for alchemy." 𝕗𝐫𝚎𝗲𝘄𝐞𝕓𝐧𝕠𝘃𝕖𝐥.𝐜𝚘𝚖

"I see." Zhang Fei approached one of the furnaces, but it shattered as soon as he touched it. "Eh? Why did this furnace crumble by itself? Even though this place has been a ruin for many years, an alchemy furnace shouldn’t be destroyed like this, right?"

"The furnace you just touched was just an ordinary one." Feng Yao waved her hand, and a stone door was exposed before their eyes. "Let’s go in, husband! The best alchemy furnace is in that room."