The Tumara Cloud is an air nebula a mere 700 miles across. The [[Antilan Empire|Antilans]] have established a number of free-floating towns within the nebula, using their crystal platforms as foundations. The [[Antilan Empire|Sun Mages]] use this area as a naval base for building and repairing their crystal ships. This colony is the center of Antilan spelljamming might and is defended accordingly. More than a hundred separate attempts by [[Illithid Empire|Illithid]] to destroy the ship-building facility have failed in the last Cycle alone, and several more were stopped before they ever reached the Cloud.