Erelhei-Cinlu, Vault of the Spider-Moon

Erelhei-Cinlu clings to the southern bank of the Pitchy Flow under a turnkeoite-lit ceiling that resembles a pink-violet moon, its streets a maze of crooked, alien architecture ringed by a seamless basalt wall, and its eight noble houses ruling by webs of adoption, cruelty and ritual.

City (Underground)

Erelhei-Cinlu, Vault of the Spider-Moon

A webbed city beneath a glowing, alien ceiling where matriarchs weave fate with poison and silk.

TypeCity (Underground)
Population27,000
WealthUneven but generally affluent for noble houses and artisan cabals, destitute for outcasts and slaves
GovernmentOligarchic matriarchy led by eight noble houses with ceremonial supremacy of Lolth's priesthood
ReadinessHigh within house territories but inconsistent citywide due to divided loyalties.
Erelhei-Cinlu clings to the southern bank of the Pitchy Flow under a turnkeoite-lit ceiling that resembles a pink-violet moon, its streets a maze of crooked, alien architecture ringed by a seamless basalt wall, and its eight noble houses ruling by webs of adoption, cruelty and ritual.

Claustrophobic grandeur, bitter rivalry, sly opulence, and a constant undertone of lethal ceremony.

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Connections

Geography

RegionVault beneath the Alamir Mountains at the southeastern edge of Tethyr
ClimateDamp, cool, and bioluminescent with pockets of warm steam from subterranean vents
TerrainA six-mile cavern studded with crystalline growths, fungal forests, rivers, and a vast subterranean lake
Travel Links
A guarded tunnel network to the Great Fane of LolthA trade tunnel to surface smugglers and distant merchant estatesSecret hatchways and waterways connecting to other Vault caverns

Culture

Matriarchal dominance, ruthless meritocracy for males, sacred secrecy, and veneration of fate, revenge, and spectacle.

Races
DrowScale-folk (lizardmen, troglodytes)Goblinoids (goblins, bugbears, hobgoblins)Surface refugees (humans, dwarves, gnomes, halflings)IllithidTrollsYugolothsKuo-toaDemonsUndead
Religions
Lolth (Spider Queen)AngharradhQueen MabTycheSetDendar the Night SerpentOdan
Arts & Entertainment

Theaters stage decadent, participatory spectacles and hallucinogenic drama, gladiatorial arenas and gruesome puppet-plays please crowds, and artisans form competitive cabals to outdo each other in obscene craftsmanship.

History

Government

LeaderCouncil of Matriarchs (spokeswoman: Matron Velyss Tormtor of House Tormtor)
Oligarchic matriarchy led by eight noble houses with ceremonial supremacy of Lolth's priesthood
Key Laws
Only pure-blooded drow possess full legal rights.Matron-issued orders are absolute regardless of house origin.Slavery is legal and regulated by house decrees.
Problems
House infighting threatens trade stability.

Secret plots between House Everhate and House Despana have disrupted caravan protection, costing merchant pledges.

Illithid research incites religious outrage.

The Anti-Solar Institute's experiments on sunlight magics provoke whispered threats from Lolth's priestesses.

A slave revolt simmers in the Ghetto of Slaves.

Escaped cages and secret meetings hint that the slaves and certain outcasts plan a coordinated uprising.

Economy

Industries
Slave trade and gladiatorial spectaclesGemcraft and exotic mineral refinement (turnkeoite processing)Forbidden lore commerce and arcane experimentsArtisan workshops (weapons, alchemy, embalming)
Scarcity

Fresh food and sunlight-based reagents are scarce and costly.

Wealth LevelUneven but generally affluent for noble houses and artisan cabals, destitute for outcasts and slaves
Exports
Polished turnkeoite and other luminous gemsOrnate weapons and ritual fetishesBound undead and trained mercenary services
Imports
Surface luxuries (spices, textiles, books)Salt and sunlight-derived reagentsCertain beast-stock and planar slaves

Defenses

ReadinessHigh within house territories but inconsistent citywide due to divided loyalties.
Fortifications
Thirty-foot seamless polished basalt wall with regular forty-foot towers.Fifty-foot river wall manned exclusively by female soldiers.The Flying Bridge — a fortified single crossing over the Pitchy Flow.
Vault Guard and House Retinues(Several thousand mixed troops under house banners and private mercenary contingents)

Female-dominated house soldiers man river defenses while male specialists and yugoloth mercenaries supplement garrison forces.

Law & Order

crime Level
High in the Outcasts and between houses, moderate in noble quarters.
enforcement
Reactively brutal, enforced by house agents, priestly inquisitors, and hired mercenaries.
typical Punishment
Public executions, ritual enslavement, or magical binding depending on status.

Calendar of Events

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