In the Ancient Era, the highest realm attainable by Human Cultivators was the Spirit Refining Realm.
Even today, in certain worlds among the myriad heavens beyond the Sacred Alliance World, as well as in the cave-heaven worlds created by those Imperial Realm immortals and gods, the Spirit Refining Realm still stood as the peak of mortality.
However, during the Ancient Era, those in the Spirit Refining Realm could be granted a Heavenly Talisman and achieve godhood.
After the Great Tribulation, throughout the myriad heavens and worlds, no mortal had ever again broken through beyond mortality.
Yet in the Sacred Alliance World, at the beginning of the Crimson Nether Era, the Ancestor of Penglai had opened up a new realm above the Spirit Refining Realm!
Those in the Spirit Refining Realm imitated the divine domains of immortals and gods, thereby acquiring part of their authority. Hence, they were called Scenery Creation Divine Lords!
Lin Yan's Inner Scenery Divine Domain imitated the complete Underworld.
He likewise possessed the Underworld's wondrous powers.
But imitating the Underworld with the strength of one person ultimately made it difficult to perfect.
Now, the clearest way to perfect the Underworld Inner Scenery was to devour all the Underworld's authorities and merge the Netherworld of the Old Era into the Inner Scenery Divine Domain.
"The Sea of Blood of the War God was refined by the Yin Emperor back then and became part of the Underworld."
Lin Yan thought to himself, "That's why, in later generations, the Inner Scenery Divine Domain I refined by imitating the Underworld contained the Sea of Blood of the War God."
After reclaiming the Sea of Blood of the War God, he had already acquired part of the Underworld's authority.
His own Qi Devouring Divine Ability had long since obtained the Yin Emperor's