The Demon Wastes consist of the broken and shattered lands north and west of the Shadowcrags and the Icehorn Mountains. A vast swath of badlands, ravines, and treacherous plains stretches from the mountains to the shores of the Barren Sea—a toxic landscape that is anathema to life.
Life in the Demon Wastes is uniformly horrid and short. Little grows here, and what few creatures can survive these lands share the same corruption as the Wastes’ humanoid inhabitants. The ground is toxic, and poisonous winds scour the landscape as volcanoes belch forth ash, flaming rock, and acidic rain. Unforgiving deserts of black sand are dotted with old ruins and oases filled with brackish water, while steaming fissures offer glimpses down into rivers of lava and the tunnels of Khyber. One cannot dwell here for long without feeling this land’s corruption, and explorers who linger too long in the Wastes are often driven mad, either wandering off into the wasteland to die or joining the barbarian tribes.
Even entering the Wastes is a challenge. The Barren Sea is home to dark and sinister fiends that dwell in horrid cities far below the waves. Sharks, venomous fish, and pirates control these waters, and tremendous storms send ships to splinter against the rocky shore. Access is no easier by land, for past the mountains separating the Demon Wastes from the Eldeen Reaches, the perils of the Labyrinth await. Boiling mud, scree fields, and other hazards erupt without warning in this seemingly endless maze of perilous canyons.
Despite the hardships of this land, the Demon Wastes teem with life. Gnolls, orcs, humans, and tieflings all dwell here, preying on each other and on the corrupted creatures of the Wastes. The Unknown, as they are known, are a diverse lot, distinctive in their customs and beliefs. All are controlled and consumed by the evil trapped beneath this land.
The presence of natural and supernatural resources in the Wastes draws the attention of the dragon marked houses. In particular, House Tharashk maintains an outpost at Blood Crescent, from which it mounts frequent expeditions in search of dragon shards and relics from this land’s ancient ruins.
The Demon Wastes present a picture of Eberron as it was during the Age of Demons, and death is not the worst fate that can befall explorers here. Magical power infuses the ancient ruins, masking them with potent illusions to deceive and lure the unwary into ancient traps or demonic lairs.
The Demon Wastes are perilous lands filled with vile creatures, foul fiends, and savage tribes of humanoids bent on slaughter. To explore the Wastes is to invite a fate worse than death, but in spite of the risks, these lands attract more then their share of adventurers. The Demon Wastes are home to abundant deposits of Khyber dragonshards.
The true powers of this realm are the Lords of Dust, servants of the evil overlords that have been buried beneath the shattered landscape for a hundred thousand years. Their plots in the world are carried out by myriad agents, including demons and other fiends, night hags slipped free from the Feywild, and their corrupted human, orc, and tiefling thralls.
Evil is pervasive in the Demon Wastes. The fractured landscape offers numerous access points to the depths of Khyber, where hideous demons and elemental horrors escape the Churning Chaos far below. In the Wastes, fiendish magic has weakened the barriers between all the planes, and gates arise and disappear here without warning.