Treasure yellow heaven came from Daoist Countless Treasures.
In the Medieval Antiquity Era, a rank eight Gu Immortal, known as Daoist Countless Treasures, acquired a fragment of yellow heaven by chance. He fused the fragment into his grotto-heaven, and formed treasure yellow heaven.
After a Gu Immortal's immortal aperture absorbs a fragment of the immemorial nine heavens, it would be placed in the outside world of the five regions, and could not be moved anymore.
Treasure yellow heaven was the same, ever since it was placed in its location three hundred thousand years ago, it had not moved.
But where was treasure yellow heaven's exact location? This was a huge mystery, people did not know. Wisdom path Gu Immortals had tried to deduce it over the years without finding the answer.
Treasure yellow heaven's original owner was Daoist Countless Treasures. After him, there were no successors.