For some reason, I'm tempted to write a massive outline of events for everything in the Deeganverse. It'll take a fair bit of archive binging, but some things flow pretty well. For example, we know that necromancy was developed well before the first Chaos Cult thanks to Rillian already being a rotted corpse, likely before Acibek due to the human Helixa being present at the ritual of his creation. I'll through in my own speculation to fill in gaps, and retroactively adjust where needed.

For example, who here thinks it was an assassination attempt on the Royal Seer that brought the hammer down on the Blinders?