Quote Originally Posted by Wintermoot View Post
This is a self-aware stick figure parady universe (see Durkon/Thor conversation). The universe itself has certain conventions that can't NOT be followed. One of those is 'dungeons have endpoints'
Where does that come from? From the bugbears' point of view, the setup was an unending supply of food and magic items. A given door's dungeon respawned, if given enough time. They had no idea that there was a bonus level if someone completed all of the existing ones, and it would have been irrelevant to them even if they'd known, since there was no way any of them could have done it.