Few people knew that the Three Thousand Dao Provinces, one of the Ten Lands, actually bordered Great Red Heaven of the Nine Heavens, and that the distance between them was not great.
It was only because a relatively narrow uninhabited belt lay between the two realms, stretching across their junction.
In the past, because of the war of the Immortal Ancient Era, this uninhabited belt had been contaminated by the Foreign Domain. It was filled with darkness and strangeness beyond ordinary imagination, where a moment's carelessness could unleash a great calamity. Almost no one could set foot there safely.
Thus, passage between the two realms had been severed, preventing any true contact.
And Immortal-Falling Ridge, an Immortal King's forbidden zone, stood nearby.
Immortal-Falling Ridge was not merely a single mountain ridge, but several exceedingly vast and towering ranges, like concentric rings separating the worlds within and without.
At some point in the past, a True Immortal had fallen at Immortal-Falling Ridge. Thus, these mountains, which had originally lacked a specific name, had acquired their name, which had continued to spread by word of mouth through successive generations.
Geographically, Immortal-Falling Ridge was a life forbidden zone within Great Red Heaven, but it stood right beside the edge of the uninhabited region and was not far from the Three Thousand Dao Provinces either.
Indeed, among the three existing Immortal King forbidden zones in the Nine Heavens, Immortal-Falling Ridge was the closest to the Three Thousand Dao Provinces.
This was also the easiest place to travel between the two realms. If a True Immortal descended into the mortal world, they could even disregard the uninhabited belt between them and travel freely through it by virtue of their formidable strength.
The life forbidden zones that still existed in the Nine Heavens had either