Dao

Dao tend to be greedy, malicious genies from Atum. They adorn themselves with jewelry crafted from precious gems and rare metals, and when they fly, their lower bodies become columns of swirling sand. A dao isn't happy unless it is the envy of other dao.
  The dao dwell in complexes of twisting tunnels and glittering ore-veined caverns on Atum. These maze works are continually expanding as the dao delve into and reshape the rock around them. Dao care nothing for the poverty or misfortune of others. A dao might grind powdered gems and gold dust over its food to heighten the experience of eating, devouring its wealth as mortals consume a precious spice.
  A dao never assists a mortal unless the genie has something to gain, preferably treasure. Among the genies, dao are on speaking and trading terms with the Efreet, but they have nothing but scorn for Djinn and Marids. Other species native to Atum avoid the dao, which are always seeking new slaves to mine the maze works of their floating earth islands.
  The dao trade for the finest slaves that money can buy, forcing them to work in dangerous subterranean realms that rumble with earthquakes. As much as they enjoy enslaving others, the dao hate being enslaved. Powerful wizards have been known to lure dao to The Overworld and trap them in the confines of magic gemstones or iron flasks. Unfortunately for the dao, their greed makes it relatively easy for mages to cozen them into service.