[Ziggurat]

As Megabot says, for some chests you have to reload a game that was saved before you enter the quadrant. In this case, before Rayjin Shallows. It takes longer, I wish they had set it up to be randomized when you open the chest but, unfortunately, it is randomized when you enter the whole area. Other items like *light* swords in this area are also randomized when you enter the Shallows. This difficult feature of the game is also found in Wiz 7 and Wizards and Warriors for the really good items.