That is what I thought for a time. But their world must be more closely tied to the reality that our heroes reside in as all their answers are only from that reality. Not what could be (alternate realities), But what is (Current reality). Portal stone worlds have their own version of our heroes...
The Aelfinn and Eelfinn have always intrigued me. There is not much information on them and that allows theory crafters like myself dig a little deeper and personalize the story we are given. Here is an interesting theory that I created (If it exists elsewhere, I don’t know of it). I apologize...