Xaeyruudh's Index

Undermountain

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This information is intended for use with the Dungeons & Dragons role-playing game.


At a Glance

A vast subterranean complex of tunnels and chambers, found beneath Waterdeep. Halaster Blackcloak rules here, relying in part on a mythal-like system of spells he created to manage the dungeon and its occupants.

There are many entrances to Undermountain, including portals from Myth Drannor and probably a dozen other old cities. Even within Waterdeep there are more than a handful of doors both magical and not. There’s the Long Dark Stair, the Blue Mermaid Passage, and the Dungeon of the Crypt, as well as various dark tunnels in the sewers that are easily accessible from anywhere in the city. The most widely known and most often used, however —the “front door” of the dungeon— is the dry well in the Yawning Portal.

Levels and Sublevels

It can be difficult to imagine all these levels in three dimensions, so here’s a handy profile map.


Sources

Passing Mention
Other Resources

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