Mundus Vastus

The great desert of Mundus Vastus emerges from the Pelagus Pulvis, a gaseous sea of mist and dust. Mundus Vastus was once the land of humans, but a thousand years ago, the Mugitus Terrae happened, and the great cities of men were all swallowed by the desert sands. The only place unaffected was Aerodreum, the largest island of the Pelagus Pulvis. The humans use pristises, flying ships ("whales") to traverse the Pelagus Pulvis. After the Mugitus Terrae, they were exiled to Aerodreum and named its greatest city, Arx Arcis, their capital. The people of Aerodreum only returned to Mundus Vastus two centuries ago, where they founded their first new settlement, Victus. Since then, they are slowly trying to reclaim their lost land from the ever-changing sand. Fifty years ago, while re-exploring the vast deserts of the continent, the humans made contact with who they call the nocti - another race of humans, which seems to have survived the Mugitus Terrae by retreating to Regnum Obscuritas. Regnum Obscuritas is a land lower than the rest of the deserts of Mundus Vastus, to a point where it is somewhat overlapped by the Pelagus Pulvis. The mist and dust in the air there obscures the sun to an extent, making the desert heat less extreme and thus more hospitable. The nocti utilized this property of Regnum Obscuritas to survive. Their capital is Acuelus Umbra, and they call the people of Aerodreum "phoebi". The two races only made contact about fifty years ago, but so far, they seem to be friendly toward one another.