... IIRC if you sack Castle Lambent, it doesn't automatically lock all the other castles against you, so try the castle in Tularea. If the Tularean castle is locked as well, what might have happened is what happened to me. I was exploring the Tularean Caves, and I found a passage. I went through the door at the end to see where it went, and found myself inside the castle. I realised where I was, killed nobody, turned around and left, but thereafter the castle throne-room was locked against me until respawn. Apparently just going through the door counted as unauthorised entry and was enough to get me excluded fromt he place.
