The djinn are genies from the elemental plane of Air. There,
among their kind, they have their own societies. They are
sometimes encountered on earth and may even be summoned here
to perform some service for powerful wizards. The wizards
often leave them about for later service, safely tucked away
in a flask or lamp. Once in a while, such a tool is found by
a lucky rogue, and some djinn are known to be so grateful
when released that they might grant their rescuer a wish.