'Immortal energy' is something exceedingly rare among countless worlds.
Even a Heavenly Monarch has never heard of it.
Ordinary Great Powers might have heard of it, but are unlikely to see it in their lifetime.
Such a thing can only be controlled by those Immortal Sects where someone once ascended to the Immortal World, and it is the most precious resource within one, tightly held by the sect's senior members and ancient powers, unwilling to share even a trace with others.
To understand,
The reason an Immortal Sect is called so is due to its profound foundation.
Though no one has ascended in the Cultivation World for millions of years, leading many cultivators to doubt the existence of 'immortals', only those truly powerful sects know the Immortal World certainly exists.
In countless worlds, even a wisp of immortal energy is enough to have those in the Refining Void split their heads fighting for it.
This also demonstrates,
Just how terrifying Central Earth truly is.
