Soul Fire needs fuel, and that fuel is the incense and belief of the mortal world. If the kingdom in the Netherworld is strong enough, Soul Fire is able to extract essence from the Dark Sea. In doing so, their realms will gradually ascend and eventually form a continent of the Underworld on the surface of the Nether Sea,
The truly powerful Ghost God Emperors all possess such an Underworld continent above the sea, and above their imperial thrones, a Soul Fire sun that can illuminate the Netherworld will blaze. The land bathed in the light of the Soul Sun marks the borders of the Underworld continent. Under its illumination, the souls within can live as in the mortal world, act as usual, and even cultivate normally. Those who succeed are known as 'Everghost' Great Spirits and Ghost Gods comparable to True Persons of the Divine Repository in the living world.
