Ever heard of them? They're mentioned in the Core book on page 258 under Daemons.

Can't find any other mentions...

4 hours ago, Jargal said:

Can't find any other mentions...

I like that the sentence basically says, "And no one needs to remember this because it was obviously a thing."...

Got an official response.

No official placement of planet or description of event. Just one of those vague things for GM's to use as seen fit.