The vast desert in Middle Osteth, bordered by the Inner Sea to the west and the Yushad Ridge to the north, east, and south.
Along with the Yushid Ridge and its surrounding dry lands, this desert is where the Gharu'ndim have made their new home. Towns in the A'mnun Desert are Yaraq, Tufa, Al-Arqas, and Xarabydun. Fadsahil al-Tashbi the Gharu'ndim master archmage lives in the A'mun.
The A'mun is home to many Empyrean ruins, mostly of Dericost origin. You will find many Skeletons here. Tumeroks prefer dry climates and also have a presence in the desert. Aerbax used to conduct some of his early experiments here, and you can find his Dolls, Rifts, Marionettes, and alterer Reedsharks lurking in the sands. The Burun Ruuk also have a small presence in the Desert near Fadsahil al-Tashbi's shop, where they have magically altered the dunes into swamp.