The Bright Swarm -- The Dark Zone
This is a most impressive collection of meteors, each a glowing bit of molten material a foot or two across. The orbit of these objects intersects that of Dragonworld every few years; occasionally one or more will enter the atmosphere and survive re-entry. The metalic core of these objects are prized among Dragonworlds priests and wizards; many of that worlds past heroes bore weapons and armor forged of the `sky metal'. (In game terms, even normal weapons forged from the cores of these meteors are magical, and at least +1 to hit and damage).
This is a huge, size `F' region of space somewhere in the asteriod field that is affected as though by a `Continual Darkness' spell. Ships entering this area loose sight of the stars, and become unable to determine their location (locator devices simply do not work). Light producing spells have only a 50% chance of working in this area. To make matters even worse, those in the Dark Zone suffer a slight draining effect, loosing 1 hit point per day spent within its bounds. There are unconfirmed reports of derelict ships and asteriods within the Dark Zone.