Originally Posted by
Unholyshaman
This used to work at level 70, but I believe the system has changed now.
In order to get each extra bit of loot, you need to release the NPC in the cage DURING the timed event. That NPC then unlocks the extra loot. So you can't go and kill bosses then come back and free the npc/loot the chests because the NPC dies when the timer runs out (exception being if you actually clear all 4 bosses within the timer, but if you have a group that can do that they I think they know ZA pretty darn well now).