The Mystery Box of Ulam

I think there's a question of like, why did they come there? Why have they left? It says that they just disappeared poof. And I'm very curious as to how they achieved that. Certainly they seem to be really interwoven with Fabriels and like the use of Fabriels makes sense for the eryali but always fun to get a mention of them. Did we want to open up the mystery box that is Ulam? Of course, yes.