Undervaults of Ilsensine

The district of Oryndoll known as the undervaults of Ilsensine was deep beneath the ring caverns. and could not be walked to. The only ways to reach the undervaults were either through teleportation or other similar spells or disciplines or digging. The Undervaults are all connected together in an interlocking pattern.

This was the site where Oryndoll's temples and its stores of knowledge that rivaled what was held in Candlekeep. This section of the city was essentially an illithid themed library, with lore stored in water-filled pools that also had encephalic fluid that was psionically imprinted with millions of pieces of lore instead of books. The library was cataloged using Qualith on the wall above every basin. A non-illithid was able to gain random information from the pools with use of psionics or similar powers, though without being able to read Qualith, the contents of a basin or how to use it properly could not be ascertained. However, non-illithids caught in this section of Oryndoll were killed on sight.

This was also where the deity Ilsensine manifested during the Time of Troubles. The city's elder brain Encephalithid resided within the grotto of sacred thoughts

Locations in the Undervaults of Ilsensine
The Cenotaph of Maanzecorian: This was once a small house of worship in the Undervaults of Ilsensine.

The Grotto of Sacred Thoughts: This was a vast natural cavern in the heart of the Undervaults of Ilsensine.