Downshadow

Downshadow was a cavernous area in the south-east corner of Undermountain's first level, below Waterdeep.

Defenses
As of 1479 DR, the top levels of Undermountain were mostly cleared of monsters although some creatures still roamed the halls and many magical traps remained active.

History
In the years after the Spellplague, the vast cavern of Downshadow turned into a sort of village made of dirty tents, curtained-off areas, and crude shacks made from salvaged materials. It was inhabited by outcasts, criminals, and down-on-their-luck adventurers exploring the lower levels. The cavern even had crude taverns and merchants who sold questionable goods.