Portalbendarwinden is a human male hermit which can be found in the south-east of the Area North of Nashkel. For a hermit he's straightforward to the point of sarcasm, and states upfront he is annoyed by people who constantly pester him with questions "about the nature of existence".
You can press him for answers nonetheless (dialogue options 1, 3) and he will drop hints about Gorion's Ward real nature by pointing out that he/she is "at odds with him/herself". He will also mention that "Your coin is on its edge", which is a reference to the legend about the Fateful Coin. He then leaves the map.