Citadel of the Dust Devils

From the introduction: Here lies the citadel of Frish, the Dust Devil Lord. The citadel looks like a flat, squarish mound of packed earth. The floors within the mound are covered in a foot of loose sand and the air is so laced with dust it is difficult to breath. The citadels interior is divided into host of smaller chambers. The two entrances are blocked by an iron portcullis.