Hello, I have not followed BS's interview closely, but here's my theories, about Urithiru. 1. Let's start with Szeth? What's the most sacred thing to Shin folk? Stone. They don't step on stone, Szeth was feeling very uncomfortable during his assassionations, walking on stone and making remarks how it was blasphemic. 2. Shin people guard their land very well, no outsider is allowed to step deep into their territory, and are only allowed to trade, right? Correct me, if I'm wrong here. 3. So that makes me believe that they guard something very special and that's Urithiru in my opinion. Stone is sacred, remember? I believe Szeth stepped on Urithiru or, traveled somehow there. He's a windrunner, as far as we know he can't teleport, but he MAY be able to fly (BS might be keeping this as a secret for now). I don't think it's that easy to enter Urithiru, but I think Szeth might have found a way. When I think about it though, BS won't make stuff like that easily predictable.