Leir III is the final planet from the sun of the Leir system. A carbon planet, Leir III's surface is a sandy desert partially covered in towering graphite crystals. Its atmosphere of carbon dioxide, carbon monoxide, sulfur, nitrogen, and ozone gives rise to powerful storms.
Soon after its discovery, adventurous colonists attempted to erect permanent installations that would endure the weather, but their efforts were forced to cease when indigenous valakkars, the megafauna also known as giant sandworms, repeatedly destroyed the half-finished buildings. Today, a handful of miners and outlaws live on Leir III in temporary encampments around the planet that can be easily moved ahead of deadly storms or valakkar attacks.