The Vigil of Stendarr was created, and playing as Anvil, they somehow became my vassal. I'm not exactly sure, nor do I remember getting an event (I probably clicked through it too fast or something). As my vassal, and going into the Holy Orders tab, I had realized that I couldn't raise them. So I decided to grant them independence, and I still could not raise them. Does anyone know what this would be? They aren't particularly strong, but I am interested all the same.
Also, I was wondering if there was any sort of Mongol invasion equivalent for Elder Kings? I couldn't help but notice the Daedric culture group in the Ruler Designer, and am holding my breath for a Oblivion Crisis.