The Frenzied Beast Train gradually came to a stop. As soon as the doors opened, the bustling voices of the Black Iron City station came rushing in.
In other worlds, this was a common sight. In the Eternal Light World, however, it could only be seen at Black Iron City Station. This was the only large-scale shelter in the world. As for Shelter City in the central region, it was merely a cage built by the Church of No Light.
When Su Xiao had first entered this world, he had seen in its introduction that the lifespan of Shelter City's residents had been continuously declining over the past hundred years. At first, few people lived past sixty. Now, almost no one could live past forty.
In a high-level world like the Eternal Light World, the average lifespan of ordinary people among its races was around 200 to 270 years. The situation in Shelter City clearly meant that the No-Light Temple had set up something inside the city that slowly absorbed the residents' source life force. The less source life force they had, the shorter their lifespans became.
That source life force had certainly fallen into the stomachs of the Four Giants of the No-Light Temple. Compared to devouring every living thing in Shelter City in one go, this method clearly allowed them to devour for a longer time.
The Four Giants of the No-Light Temple had evidently lacked a life-type secret treasure. The reason the four of them could work together was also because they could divide the source life force obtained through Shelter City.
Even world-destroying existences and abyssal spawn as powerful as the Four Giants of the No-Light Temple would not perish from failing to devour source life force for a long time, but they would grow weaker.