Keepers of the Moon settled and found footholds in the Black Shroud much much later than when the Elementals were kicking everyone out and holding them at bay with their own power. We must remember that the Elementals claimed the Shroud and defended it on their own from the Ixal and Elezen BEFORE they said "wipe Gelmorra of the map." They relied on the alliance of Wildwoods and Hyurs do do this for them. Whether this was because, or the first crumble of the decline of the Elemental's power is a matter for debate. The fact remains they chose not to, or could not wipe out Gelmorra themselves. Mi'qote tried to find homes in the Shroud a while after this period.
