[quote=@Cuccoruler]
Would it be possible for Cythlla to know about the dead god? I mean she is a researcher of sorts in the dark arts
[/quote]

I'm on the fence. A necromancer would totally know, but I imagine the order has him on strict need to know policy.
Oh! I know! With the attacks, maybe you've been granted access to the files about him! 
Up to DT though