Svivren III is an inhospitable gas giant in the Sviveren system. It has a highly toxic atmosphere, mostly of cholorine and is too hot for most lifeforms to survive unprotected. In addition to this, it is slightly radioactive. In modern times, the Imperial government has used it as a base for dangerous experiments, that would be very risky to perform on a highly populated planet. There is no visible reason why Saubeduin has no atmosphere. It posses a powerful enough gravity field to make some form of atmosphere almost certain. However, archeologists have discovered the remains of what could have been artifacts, artifacts that match no design patterns from any known civilization. Furthermore, these artifacts (if, indeed, that is what they are, date to several million years before any race is known to have space travel. Some scientists speculate the, many millions of years ago, Saubeduin was the home of an advanced race of winged humanoids that, through war or accident, destroyed their atmosphere and killed themselves of with atomic weapons.