Lith's predecessors hadn't left all those goodies out of the goodness of their hearts. Finding something valuable inside Huryole required luck, plus one had to fight not only against powerful monsters, but also against time.
The lost city was a living labyrinth that would periodically rearrange itself, making any old map useless. To make matters worse, its walls couldn't be affected by earth magic, dimensional magic was sealed, and destroying the walls to make haste only made the cursed item that ruled Huryole angry.
Normally, the problem with the inhabitants of a lost city was that they would grow in power and numbers over time. It was a Ranger's duty to cull them and reset their power before they became too strong.
In Huryole's case, however, the number of creatures that spawned and their power was fixed. Even the monsters had a hard time finding their way out of the city and Lith only had to kill those who managed to reach the external barrier before they could breach it.
