The primal elements of Subazurth are not the same as in the Land of Azurth above, though why this is so is not entirely clear. Perhaps they represented altered or tainted refuse from the creation of Azurth by the giant crystal gnome, Gob, under the direction of the Lady Azulina. Here are the elements as found in the world beneath the world:
Dust: It's elements tend to be indolent folk, resting as often as they cane, though some cause mischief as swirling dust devils. They lay claim to unused caverns, but their primary habitat is the air itself beyond many a yawning precipe.