For years to come, people would still consider what the Zhen Clan in Heavens Cold City, Jinyun Country of Waii Sub-Continent did on July 7th, 890 of Black Iron Calendar as the symbolic event of the arrival of the Third Holy War between humans and demons by many people.
The arrival of the previous 2 holy wars between humans and demons were both symbolized by human cities being destroyed or occupied by demons. However, the event in Heavens Cold City was not launched by the demons themselves, but Heavens Cold City still collapsed. Although it was demons' lackeys and remnants of Three-Eye Association, this event still started the Third Holy War.
According to the public information, before the event in Heavens Cold City, there were in total, a population of over 1.3 million in Heavens Cold City. After that event, although with the efforts and rescue from all parties, less than 30,000 people survived. From then on, Heavens Cold City had deteriorated into a ghost city.