
5 bosses, 2 of which are secret, -?- thief chars, 20 unknown clue chars made from random farms and the t-admins will check their fight logs daily then send out CMs to those beating them during the climb. Limited BA? No decay? Who knows.
The other idea is a large dwarf expedition group into a collapsed mine city. The map is made/revealed as the group(s) progress. All start off in the same super group then can make decisions to go their own way at the forks. Or to run away from all manner of threatening events. Limited BA? Move based for sure. Race against the clock? Treasure along the way? Debatable.