Clues could be found in the order these Hidden Sects had established.
A million years.
Over the past million years, countless Immortal Cultivators had perished on the Kunwu Continent.
The true qi or spiritual qi these Immortal Cultivators cultivated all came from the Kunwu Continent's spirit stone veins.
Yet after these Immortal Cultivators died, only a tiny fraction of the true qi and spiritual qi they had cultivated returned to heaven and earth.
The reserves within the vast majority of Immortal Cultivators decayed and dissipated with their deaths.
Only the immortal reserves of Dao Integration Realm cultivators remained within their Dao Foundations.
But for the Kunwu Continent's surface world, the Guiyi Realm was already the limit for its Immortal Cultivators.
With one exception.
Shen Xuanwei.
After learning of Shen Xuanwei's existence in the Luoling Sect's Library Pavilion, Chen Yan had searched like a madman for every file and record concerning this Immortal Cultivator, who had deduced while still in the Guiyi Realm that the Path of Immortality should have fifteen major realms in total.
Shen Xuanwei had remarkably original insights into immortal cultivation.
Although Chen Yan could clearly see from the writings he had left behind that Shen Xuanwei's perspective was limited by his Guiyi Realm cultivation, many of his conjectures and his understanding of the Path of Immortality surpassed Chen Yan's own.
They even gave Chen Yan the feeling of having the tangled brush suddenly cleared from his mind.
Especially Shen Xuanwei's deductions and conjectures concerning the two realms above the Guiyi Realm, the tenth realm beyond those, and the five realms above the tenth.
He had accurately guessed that the tenth realm on the Path of Immortality should be a transitional realm between the first nine and the last five.
He had also concluded that the gulf between