The Heavenly Immortal Realm corresponds to the Ninth Tier within the Pot Cave Heaven.
In terms of address, in the time domain of the North King, there were quite a variety of designations.
Some were referred to as Immortal Monarchs, others as Heavenly Monarchs, and still others as various Holy Venerates and Old Ancestors.
Within the Taoism lineage, there were more Immortal Monarchs, while other factions were primarily led by Old Ancestors.
And this seemed to be more fitting for the description needed for breakthroughs into the Heavenly Immortal Realm.
After all, each cultivator from the Immortal Cultivation World at the Ninth Tier has, more or less, spread their teachings far and wide.
They disseminated their Inheritance Dharma Veins to countless Small Worlds.
Even to this end, they did not hesitate to exhaust a large amount of resources to refine various Inheritance Divine Weapons or Magic Treasures.
