Jiang Lu had never heard of the existence of Random Spirit Domains that descended randomly.
Of course, not just him, but many exorcists of his level were all unaware that, apart from the Spirit Realms they could enter through the Exorcist System, there were also Random Spirit Domains that could appear in the world.
That was because Random Spirit Domains were a type of natural disaster outside the safety zones. They were often unvanquished Spirit Realms from the past, which, upon descending, transformed into pollutants that could affect the real world. They spread continuously like cancer cells, drifting everywhere.
The areas affected by them naturally became hazardous zones, no-man's-lands, while most exorcists almost exclusively entered Spirit Realms from within safe zones and hardly venturing out of the city before they grew stronger.
