Rovagug destroys the mechanism of forward temporal causality.
Back when time was moved by the Quern of Change. Stuff was a little more loosey-goosey back then, it seems, or else maybe our magic mineral dating processes are just not that reliable over really long periods, eh, whaddayathink. Anyway, deposits from this period are really, really thin, and have a stupid high preponderance of biogenic matter. It almost seems like erosion hadn't been properly turned on yet.
It is speculated that this is when the Gods first entered the world. They may have been hanging around somewhere else up until then, talking and having a smoke, but now they're really on the stage. They began making their Special People at this time, but all of their early experiments went off the rails relatively quickly.
Humans seem to now be about as behaviorally complex as in modern times, and have diverged into the current major subpopulations. Some types of writing were invented around now, probably by lowhuts.
Lowhuts have crossed the World Sea from the Eastern continent to the West, bringing written language and probably lots of beer.
Everything changed when the first tree was cut down. It was really on. Like on on. Mortals duking it out with immortals. Plagues kicking mortals in the belly and taking their lunch money. Mortals writing stuff about how bad things are. Everything is now intense, and somebody's gotta take the fall before it's all over.
Distrocutor disappears after being weakened by a confrontation with the Blue Ball Lightning
The fortresses which later became the cantons of Rhaul are established in the wake of a bloody swath of battles.