To ensure Yang Che could successfully form his Golden Core, Tianxie Ziyin specifically instructed Sha E that no one was to enter the Purple Heaven Secret Realm during this period.

The black-robed demon Cultivator, Sha E, naturally obeyed his master's command and immediately sealed off the Teleportation Array leading into the Purple Heaven Secret Realm.

At this moment, on the peak of Jie Tian Peak.

Inside the Bronze Hall where Yang Che was located.

Tianxie Ziyin, with her light purple long hair, stood before Yang Che, exuding a captivating fragrance.

Yang Che stared at Zi Yin, finding her exquisite, flawless face still as pure and aloof as a young girl's, yet her figure was gradually becoming more voluptuous, her curves increasingly distinct.

Slim where she should be, full where she should be, the immense contrast always made Yang Che feel his blood surge at certain moments, as if an inexplicable urge wanted to burst forth from within him.

Fortunately, Yang Che always had a higher pursuit. Although he greatly enjoyed appreciating such 'beauty,' he would still promptly withdraw his gaze after 'appreciating' it and focus his attention on 'Cultivation of Immortals.'

Tianxie Ziyin had long since grown accustomed to Yang Che's gaze. As a woman, if Yang Che had never looked at her with such a gaze, she would have found it abnormal instead.

"Yang Che, the essence of Core Formation is to transform all the liquid true Qi in your Dantian into solid true Qi, condensing it into a bead the size of a thumb. This bead is closely connected to a Cultivator's vital root, so it is generally also called a Golden Core. However, you possess Mutated Dual Immortal Roots and underwent Foundation Establishment with Dual Dantian, so Core Formation also requires you to condense Golden Cores in both Dantian."

Tianxie Ziyin's voice was incomparably solemn.

Yang Che's expression was equally solemn. After some thought, he said, "Zi Yin, Old Man Old Ancestor's method is to condense the Core in one Dantian at a time. First, condense one, and at the moment the second Golden Core is about to form, then take the Essence Stabilizing Pill to counteract that strange conflicting force. You said, can it be like Foundation Establishment, where we condense the Cores simultaneously, and then at the moment the Cores form, take the Essence Stabilizing Pill?"

Tianxie Ziyin said, "Of course you can. If you didn't have the Essence Stabilizing Pill, you would inherently need to condense Golden Cores in both Dantian simultaneously to continue Cultivating.

Due to the principle of Five Elements mutual generation and mutual restraint, for Dual Immortal Root, whether it's Foundation Establishment, Core Formation, or even Nascent Soul Condensation, it requires both Dantian to proceed simultaneously, otherwise it's impossible to succeed. However, the Sword Four Peak Master's method combined with the Essence Stabilizing Pill has made this separate Core Formation possible. But ultimately, the last step, they all lead to the same destination."

"Mm. Then I'll begin."

Yang Che had already adjusted his spirit, Qi, and essence to their optimal state, so he immediately sat cross-legged and began to attempt to condense a Golden Core in his Middle Dantian.

The Heaven and Earth Spiritual Qi in this Purple Heaven Secret Realm was rich. As the Sky Thunder Scripture circulated, Yang Che immediately felt the surrounding Heaven and Earth Spiritual Qi frantically pouring into his body.

The thunder-attributed true Qi in his Middle Dantian also began to churn violently, being continuously compressed.

Tianxie Ziyin casually cast a barrier, protecting Yang Che within it, then slowly paced to the open space in front of the Bronze Hall.

She looked up at the mysterious dome formed by thick clouds above her head, a thoughtful expression in her eyes.

After an unknown amount of time, Tianxie Ziyin suddenly pointed her finger, and a golden light instantly flew into the cloud sea, directly striking the mysterious door-like area of the dome.

As soon as the golden light entered, a thunderous rumbling sound immediately echoed.

Tianxie Ziyin's face showed a hint of surprise. She looked back at the Bronze Hall, then again at the cloud sea dome from which the thunderous sound emanated, a contemplative look in her eyes.

...

More than three years passed in a flash.

On this day, a series of thunderous sounds suddenly came from Yang Che's Middle Dantian. Those liquid true Qi, after being compressed to the extreme, finally condensed into a thumb-sized bead with lightning patterns on it.

It was just strange that Yang Che did not feel himself entering the Golden Core Stage.

In his confusion, he could only helplessly continue to condense the Golden Core in his Lower Dantian.

...

Another three years passed quickly.

On this day, Yang Che's Lower Dantian suddenly flashed with a dark light, instantly transforming into a mysterious world of utter darkness.

However, in the next moment, as the dark-attributed liquid true Qi was compressed to the extreme, the darkness gradually receded, and at the same time, a little bit of solid true Qi appeared.

But at this very instant, Yang Che's Middle Dantian suddenly shook. The thunder-attributed true Qi, which had already condensed into a solid Golden Core, actually began to collapse, turning back into a little liquid.

"The Five Elements mutual restraint has appeared?"

Yang Che's heart stirred, then he gritted his teeth and continued to condense the dark-attributed Golden Core.

However, the more the dark-attributed Golden Core condensed, the more the thunder-attributed Golden Core in the Middle Dantian would revert to liquid.

Since Yang Che could not operate the Sky Thunder Scripture and the Dark Obliteration Sword Art simultaneously, he could only attend to one at the expense of the other.

After an unknown number of attempts, Yang Che finally gave up helplessly.

The Five Elements mutual restraint was truly too strange.

Giving up on condensing the dark-attributed Golden Core, Yang Che circulated the Sky Thunder Scripture to repair the thunder-attributed Golden Core in his Middle Dantian.

Immediately after, with a movement of his palm, two 'Essence Stabilizing Pills' appeared in his hand.

For greater stability, Yang Che pondered for a moment, then threw the Grade 2 Essence Stabilizing Pill into his mouth.

The medicinal power dissolved, and under Yang Che's deliberate control, this medicinal power immediately split into two, flowing into both Dantian respectively.

Then Yang Che quickly circulated the Dark Obliteration Sword Art and began to fully condense the dark-attributed Golden Core again.

This time, with the effect of the Essence Stabilizing Pill's medicinal power, it actually succeeded very smoothly.

This almost caused the constantly anxious Yang Che to lose his composure due to this sudden immense joy.

"Core Formation, successful!"

At this moment, Yang Che felt a buzzing in his mind, continuous thunderous sounds within his body, and his entire demeanor instantly underwent an earth-shshattering change.

Two Golden Cores, one black and one purple, slowly floated within Yang Che's Dual Dantian.

Upon closer inspection, these two Golden Cores, black with golden specks and purple with golden specks, were extremely strange.

However, Yang Che did not care. At this moment, he was completely immersed in the immense joy of successful Core Formation and entering the Golden Core Stage.

After stabilizing for several days.

Yang Che slowly stood up.

At this moment, his eyes shone brightly, and every movement carried an immense Aura, a faint sense of immortal elegance subtly emanating from him.

Core Formation had taken a full seven years, but fortunately, it was finally successful.

Yang Che was radiant. Although several days had passed, he still could not suppress the excitement in his heart.

Entering the Golden Core Stage meant that he could finally barely venture into this Ancient Remnant Sand Sea, and his Lifespan had reached five to six hundred years, giving him enough time to truly embark on the Dao of an Array Symbol Master.

Not only that, but more importantly, he could finally refine his own 'Magic Treasure.'

Speaking of Magic Treasures, he currently had two in his possession.

One was the Blue Stone Magical Item obtained from the lean Old Man in the Early Golden Core Stage of Jiang Huo City whom he had killed back then, and the other was the Jiao Entangling Silk obtained in Zi Tian City from Yan, the former Scorpion Guard King, who was killed by Ancient Blood Corpse Mie.

Moreover, he clearly remembered Tianxie Ziyin saying at the time that after he formed his Golden Core, she would fuse this Jiao Entangling Silk with the Flying Fire Meteor, reforge it, and then Cultivate a Devouring Thunder Art she possessed to refine a new Magic Treasure with lightning sacrifice.

Thinking of this, Yang Che was already a little impatient.

He immediately rushed out of the Bronze Hall, but as he looked up, he was stunned by the sight before him.