Southern Cloud is an ancient nebula at the periphery of Coraabia. It is a demesne of the House of Ibar, which once received this distant uninhabited location as a lien from the mad Prophet-Emperor Quagh-Puo.
The name might be somewhat confusing today, as Southern Cloud is located more in the East than South of Coraabia but the term was first used during of the War of Seven Saint Worlds, when Qu-Puo was treated as the center of the multiverse.
The Southern Cloud has only one inhabited world today - a small agrarian planet around which rotates the Lordly Moon.