The main body of the Black Fog—the final creation of the Shelter civilization, a powerful intelligent entity that was the condensation of dozens of races and all of their wisdom.
According to the plans set in motion by their leaders, each citizen of Shelter society would be implanted with a single unit of Black Fog. The accompaniment of that nanosized magical creation would keep infants immune from all sickness and calamity. Regardless what natural disease or genetic defect, the Black Fog would correct it all.
The existence of the Black Fog would greatly elevate all thought processes of its associate. It was almost the same a microchip hosted in their soul, a system that guided their strengthening and could automatically analyze the physical conditions of the associate, studying things that they did not know and determining the best outcome for the associate.