When Lilith purged Sanctuary of buy Diablo IV Gold Inarius' followers, the Archangel banished her into the Void. Unlike the Burning Hells or the High Heavens, the Void served as a vast field of "emptiness" in the universe. The lore describes the Void as an "empty" realm that can imprison various beings endless darkness. 

Unfortunately for Lilith, the Daughter of Hatred will become extremely acquainted with the Void. Despite her return from the Void in time for the Sin War, Inarius will once again banish her back. A member of the Triune will pave way for Lilith's return in Diablo 4 using a ritual of unknown origins.

After Lilith's banishment, Inarius altered the Worldstone to ensure the Nephalem would produce weaker offsprings throughout the generations. This alteration would cause the formation of powerless Humans, as well as the hiding of Sanctuary's true nature. 

However, despite these machinations, time would have its way of revealing the realm to the warring sides of the High Heavens and the Burning Hells. Moreover, Lilith would come to learn of such alterations and form a plan of her own.

Unfortunately, the Vizjerei or Spirit Clan of Diablo 4 Gold Mages would accidentally contact demons in the guise of "spirits." This would lead the Prime Evils to establish the Cult of the Triune dedicated to their worship, disguised as beings of good.