This idea I got from Super Mario Bros. 3. Basically, it's a dungeon that you have to go through in order to get to the next map. Obviously you need to get a quest for it, but the dungeon will also have a boss that you would have to defeat in order to get out. You'll also have to go back through if you want to leave the map (unless you find a tele). Simple no?
there kinda already is a few in the game its self, granted you don't have to eliminate the boss in order to get out but the quests follow this same path.
They need Solo UD. Shows more strength and makes people want to get stronger. And noone can sell drops.
You know that was actually what I was thinking when coming up with this idea. Basically make it to where you have to travel alone to get through and defeat whatever boss (or bosses) that stand in your way.
343