I recently tried to do the titan quest (archduke of scorn quest) map and was unable to finish it. I'm not sure if its because I'm just missing something, or as I think might be the case, server behavior has changed. My guess looking at the map is that the player is supposed to dimension door into the small chambers, and then get the final key that gives access to megalopos. Before the spell code was redone, this was actually possible. With the redone spell code, it is no longer possible to teleport through solid (those that block sight) walls. The walls in the the titan quest do block sight, thus no dimension door. I can't remember the rationale, but I seem to recall it was discussed at the time, and did make sense. To me, there are perhaps a couple possible solutions: 1) remove the need of dimension door - you already get keys, just put doors in those blocks that the keys use. 2) Change the walls to be the gate style walls that you can see through (and thus dimension door) 3) perhaps some third option I can't think of. I personally prefer #1. By the time you get to that map, you're pretty high level - requiring dimension door is like robbing Fort Knox and finding the last door has a padlock purchased at the hardware store. My other thought on this is it would be really annoying to get to that stage and not have a way to dimension door (in my adventures, I used a wand of dimension door to get to the castle, but that has finite charges). The real gotcha is that it can certainly take long enough to work your way through those maps that you just can't go back to down and come back again - the first maps may have reset, so you'd have to do the entire quest again.