In one of the worlds is a huge mountain in which mine gold and other valuables. And there waving Kirk voluntary miners and slaves abducted from different universes. A deep tunnels sleeping demon dragon incredible strength, it's the intended these gifts. And so it continued for centuries until one day three of the characters are not desperate to escape and was able to escape to the surface. Just walk away and throw the remaining captive comrades, and they can not get in the way of adventurers, treasure to have funding for rescue operations. They all generated a lot of waiting for the catacombs, caves and other dungeon. Eventually freed slaves to join the movement and become a real army opposing awakened villain.