The brothers Belabog and Chernabog separate from their union in anger, after Chernabog creates people without Belabog's input.
The era before the grandmother of a grandmother elf (the longest lived common race) would be able to personally remember.
Some of the older races would have parents or grandparents who had lived through these times, but (it is assumed) no-one alive would remember them.
Living memory for some of the older races. Grandmothers, or the grandmothers of grandmothers of some of the younger races, would have lived in these times.
Living Memory.
The Zima Family rides, furious with the encroaching Orthobog religion. They hunt the Spirits of the Old Beliefs, freezing their hearts and making them more agressive towards non-spirit creatures.