The Lower Realms · Lower realm
The Furnace Courts
The first named band beneath the general Lower Realms.
Entropy is law
The Furnace Courts are the first named band beneath the general Lower Realms on the Realism Gradient cross-section.
The lower realms are not one hell. They are many - realms of pure entropy, hells of specific suffering, abysses with no organizing principle except descent, and infernal kingdoms with hierarchy and politics. The Atlas names the Furnace Courts and leaves which of these it is to the Dungeon Narrator.
Survival Requirements
Traveler's notes
The Lower Realms are evil because their very fabric resists life, hope, mercy, and recovery. The primary hazards of lower realms are environmental other than creatures: the Realism Gradient at the lower end of the oblong produces a physical pressure on hope, on rest, and on biological recovery that operates continuously regardless of what creatures are present. In places where healing weakens, rest fails, darkness presses back, and despair becomes part of the air, evil does not merely appear - it evolves as the natural behavior of a reality built against restoration.
Natural healing is halved in most lower realms. In the deepest regions - the Grinding Dark, the Depths Below Thought - natural healing ceases entirely. Magical healing functions normally but feels different: the energy required to heal is real and the results are real, but the sense of restoration - the feeling of having recovered - does not accompany it. A cleric in the Grinding Dark can heal the party to full HP. The party will feel injured. Rest is partial. A full night's sleep in a lower realm provides the biological benefits of rest (HP recovery per the unsafe rest rules) but does not remove mental fatigue or restore the kind of purpose and clarity that rest in the Material produces. Multiple nights in a lower realm without returning to the Material begin to accumulate a specific psychological weight. Players should feel this, not just track it mechanically.
Light is hostile in lower realms in a way that can be difficult to describe precisely. Mundane light sources work. They work shorter and dimmer than their specifications suggest. Magical light works at specification. But the darkness between light sources in a lower realm is not merely the absence of illumination - it is something that presses back. The Lower Realm Lantern's value is not just its range. It is the specific quality of the light it produces - infernal iron's resonance makes the darkness treat it as native, rather than pressing back against it. Protection: the Entropy Ward covers the environmental pressure within its radius. The Celestial Feather Mantle helps with specific lower-realm damage types. Clerics with a connection to protective or death-transition deities have meaningful native resilience. Fighters and warriors adapted to physical hardship endure the physical aspects more readily. No one endures the psychological aspects easily - that is not a failure of preparation, it is the correct response to a place whose fundamental nature is antithetical to life.