|Vault of the Onyx Citadel|
|Sphere||Demiplane within the Plane of Earth|
|Images of the Vault of the Onyx Citadel|
Source: Vault of the Onyx Citadel, pg(s). 65
The Vault of the Onyx Citadel stretches 170 miles long by 120 miles wide, with a ceiling ranging from 1 to 2 miles overhead. Large deposits of magnetic materials along one wall provide a reference for navigation. The ceiling glows with phosphorescent fungi and alien crystals, providing a day-night cycle, and the vault's large size and abundant water sources provide occasional cloud cover and rainfall. The vault was seeded with ferns, coniferous trees, immense fungi and crystalline flora. Forests, rivers, mountains and volcanoes in the Vault all host their own varieties of creatures.
Some of the xiomorns' greatest successes within the Vault of the Onyx Citadel involved experiments in geomancy, which led to the creation of artificial ley lines, called the Stone Roads, tied to various other planes.
The following locations exist in the Vault of the Onyx Citadel:
- Argent Lake
- Calling Pool
- The Crackingwild
- The Dustbeds
- Forgetting Place
- Glass Pinnacle
- The Goodlands
- Ruins of Miser
- Onyx Citadel
- Screaming Wall
- Shaitan Stone
- Singing Keep
- Soot Seas
- Vale of Hungry Diamonds
- Watcher's Forest
- Writhing Rift
The Vault of the Onyx Citadel was terraformed by the Vault Builders under an ancient, ferocious, and short-tempered Vault Builder named Xulchuwath, who created small seeps to the Planes of Air, Fire and Water to provide this demiplane with air, heat and water, and imported or created a variety of life. Most of the Vault Builders eventually moved on, leaving the Vault in the care of the Vault Keepers, and over time other inhabitants of the Plane of Earth discovered and migrated to the Vault.
For additional resources, see the Meta page.
- Larry Wilhelm. (2017). Vault of the Onyx Citadel. Vault of the Onyx Citadel, p. 24. Paizo Inc. ISBN 978-1-60125-952-3
- Paris Crenshaw, Kalervo Oikarinen, and Larry Wilhelm. (2017). Bestiary. Vault of the Onyx Citadel, p. 83. Paizo Inc. ISBN 978-1-60125-952-3
- Larry Wilhelm. (2017). Vault of the Onyx Citadel. Vault of the Onyx Citadel, p. 25. Paizo Inc. ISBN 978-1-60125-952-3
- Crystal Frasier. (2017). Continuing the Campaign. Vault of the Onyx Citadel, p. 68. Paizo Inc. ISBN 978-1-60125-952-3