Quote Originally Posted by brian 333 View Post

Now, about the secret fortress on an empty plain in the middle of nowhere.

On the Astral Plane, distance and direction are meaningless. The security of the fortress is only in the fact that nobody knows about it. Once a character does, the character needs only to go to the Astral Plane and will himself to go there. It is then a matter of time, as the character perceives it, which depends on how familiar the character is with the destination. Xykon is a virtual step away from the tower from anywhere on the Astral Plane. Roy might be several weeks away.
I feel like this actually works as a strike against going to the fortress. The most anyone in the order knows about it is an offhand comment from Thor that it exists, and it's not clear if Durkon or Minrah even remember, given how big of a data dump he gave them just moments later. So while they could maybe find the place(not sure if that comment counts for "knowing" in this context), the idea that Xykon is still there becomes increasingly difficult to sell.