Underground water reservoirs seep up through the soil to create a dusty sludge. The hint of life-sustaining water in these mudflats attracts parched creatures, but those who venture in can become trapped.
Effect: Particularly thick sections of mudflats are difficult terrain. The mire also hides mud sinks, occupying 2-by-2-square or larger areas.
Usage: Numerous mudflats are scattered around the Sea of Silt. The rarer inland ones draw settlers, who carefully extract life-giving water from the damp ground.
Published in Dark Sun Creature Catalog, page(s) 135.