| Category | Underdark Locales |
| Continent | Karterus |
| Region | Maleddanar |
| Map | Fangath |
Inyon'van is an area of Underdark passages that lead upward to the sewers and labyrinths under Andrithiach. After the Gulimbor Cataclysm (996 - 1203), the area became a dangerous place prowled by arcane oozes, living spells and other magical creatures.