The White Lung Basin is a vast wilderness depression known as the Breathless Salt, the Mourning Flats, or Saintless Hollow. Cracked white salt stretches between rust-red stone ribs, buried salvage, and fog-choked ravines. The fixed sun flickers overhead like a failing lamp, while the wandering sun draws metallic mist across the basin. Four survivors escorting Mihu may cross this region to evade Morvath's cult, but the contamination quietly reacts to her presence and reveals their trail.