Inside Treasure Yellow Heaven, the land spirit, appearing as a young man dressed in a vibrant seven-colored rainbow robe that radiated a brilliant light, smiled warmly. "Master, here are the materials you ordered."
He handed over a bowl filled with various materials: horns, feathers, countless Gu worms, and more.
Seated before him was a middle aged man in white robes, his flowing black hair cascading around his shoulders. His eyes, deep and abyssal, slowly opened, and he gave a quiet, yet commanding response, "Okay."
It had been about 14 years inside Treasure Yellow Heaven since Fang Yuan took ownership of this mysterious Grotto-Heaven, though less than five months had passed in the outside world.
Fang Yuan retrieved the materials provided by the treasure spirit and said, "Let's start the refinement!"
"Okay." Land spirit immediately responded and gathered all kinds of materials and Gu worms beside Fang Yuan.
First material was red magma which originated ten thousand feet deep under a Volcano and was extremely dangerous. Fang Yuan's entire body would be reduced to ashes in a few breaths if he ever touched it.
Second material was a blood colored powder which had a rather large origin. The blood of ten kinds of immemorial desolate beasts were mixed, solidified and then grinded to form this powder.
Third material was none other than the aptitude raising blood, nicknamed Dragon's Blood.
With the land spirit's assistance, Fang Yuan mixed these materials as he started the refinement process.
Then he took out the Fixed Immortal Travel Immortal Gu from his aperture, and threw it inside the refinement process. The Gu still resembled a jade butterfly, but the aura it just emitted now confirmed it was a Rank 8 Immortal Gu.
He then also threw the immortal materials handed by the treasure spirit into the refinement, then poured in around ten drops of white litchi immortal essence from his second aperture.
Next, he shouted, "This is the critical juncture."
"Yes, Master," the treasure spirit responded, handing over ten Immortal Gu—one of which was Rank 8, most were Rank 7, and one was Rank 6.
Fang Yuan tossed them all into the refinement, and immediately followed by pouring in over a hundred drops of white litchi immortal essence. Then, one by one, he continued adding the remaining immortal materials into the mix.
Standing nearby, the treasure spirit watched the refinement process nervously.
....
Treasure Yellow Heaven was said to be an extraordinary Grotto-Heaven, because it is filled solely with priceless treasures.
It has been in operation for over 300,000 years and despite it, the exact location of Treasure Yellow Heaven has never been revealed.
Even though many Wisdom Path Gu Immortals have spent years attempting to uncover its whereabouts, they have always failed.
Even the most powerful Immortal Venerables and Demon Venerables tried to locate it, but the Grotto-Heaven's location remained a mystery.
But 800 years into the future, an otherworldly demon who inherited the Thieving Heaven Demon Venerable's legacy attempted to leave the Gu World.
But as he neared the Void, he stumbled upon Treasure Yellow Heaven and became its master.
Yes, Treasure Yellow Heaven isn't in a part of the Gu World, nor was it within the Black Heaven or White Heaven. It was located at the very boundary of the Gu World, a place that led to the Void—the exit of the Gu World itself.
The story continued like this:
An otherworldly demon accidentally discovered the yellow treasure heaven and instantly became its master. This happened because the land spirit's wish was both simple and sorrowful.
The Daoist Countless Treasures, the former owner of this grotto heaven, longed to see an another otherworldly demon like him.
So, he wanted to cross the void and reunite with his family, but was instead trapped within it.
After being trapped in the void for so long without light, life and only darkness, Daoist Countless Treasures had a simple final wish: he didn't want to die a lonely death.
He longed for someone—anyone—to accompany him in his final moments. This wish formed the very foundation of the grotto heaven.
Thus, any otherworldly demon who discovered and entered this blessed land would inherit it and it's entire treasures.
After the death of Daoist Countless Treasures, the land spirit transformed the grotto heaven by merging it with a Yellow Heaven Fragment, stopping the ongoing calamities. Later it started to be renowned as Treasure Yellow Heaven.
Over time, Treasure Yellow Heaven gained fame among Gu Immortals, many of whom sought its hidden treasures and ancient secrets. Yet, no matter how hard they searched, it remained undiscovered.
Why?
Because none of them ever stepped into the Void—the very place where the Daoist Countless Treasures died. They never realized that entering the Void was the true key to finding it.
800 years later, it was later revealed that Daoist Countless Treasures was not a real individual, but a split soul of the Thieving Heaven Demon Venerable, with his entire inheritance hidden within this Grotto-Heaven.
The tale of Daoist Countless Treasures was merely a cover for the Thieving Heaven Demon Venerable's treasures.
The otherworldly demon who uncovered the truth and claimed the treasures became the master of Treasure Yellow Heaven, rising to become one of the richest and most powerful Venerables in history, renowned as Artist, Artist Demon Venerable.
His influence was so immense that even Fang Yuan suffered repeated setbacks, to his great annoyance.
...
Fourteen years ago, Fang Yuan used the Divine Travel Gu as a decoy and then relied on the Fixed Immortal Travel Gu to enter Yellow Treasure Heaven—a place he had previously visited at the invitation of the Artist Demon Venerable.
Because of this, he became the owner of the grotto heaven and later removed Heaven's Will from within it.
He then upgraded Fixed Immortal Travel Gu to rank 7, then rank 8, and afterward began using Guts Gu while recovering his future memories through the Wisdom Path method.
Meanwhile, the land spirit watched his refinement process nervously.
The treasure spirit had seen Fang Yuan refine Rank 6 Immortal Gu flawlessly, and often Rank 7 without problems. But failures with Rank 8 Gu caused huge explosions, damaging the grotto heaven and Fang Yuan himself.
Over time, the spirit learned two things about Fang Yuan:
First, he wasn't a real Gu Immortal—his body had no dao marks despite using immortal essence and Immortal Gu.