| Category | Lakes | |||
| Continent | Brucrumus | |||
| Region | Aerie of Dragons, Adunamar | |||
| Alias | Dark Water | |||
| Created | 16 Temporal 9291 GE | |||
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By the start of the Hoof Front (9245 GE - 9262 GE), the demon lord Orcus was master of much of the Aerie of Dragons. One of the demon lords near Orcus, in the region Hells Womb was Demogorgon. Long-time enemies, always plotting against each other, Demogorgon set in motion a plan to open a rift in Orcus's rear. Pressed by the Covenant from the west and north, Orcus was lucky that he found the one keeping the rift open. This minion of Demogorgon, tired of his master's cruelty and poor rewards, was turned by Orcus with promises of great wealth, land, and station. The rift's closure left behind a vast body of otherworldly dark liquid that came to be known as Vul Lom, the Dark Water.
Much of the lake's contents is an otherworldly liquid from the world of Abyssm. As far as sustenance, it is equal to water, but it is darker and heavier. Very deep, its strange waters are held in place, defying the normal laws of water dynamics where liquids settle to the lowest level. In some areas, the dark blue liquid may cover a section of an area like a wall of water held in place by an unknown force. More intelligent creatures around these areas have grown accustomed to this, swimming through these walls of water to reach the dry area on the other side.
The liquid from the Abyssal world seeped into Leret Dovah, filling a surface depression and then burrowing into the Underdark where it crept along passages and into caverns without regard to gravity. It is heavier than water, breathable, yet follows no laws of filling the lowest area. In areas of the Underdark, where water does not sit atop it and press it down, it is a sight to see with streams and rivers of the stuff flowing through the air like bridges with fish, crabs, and even the occasional kuo-toa swimming along them.
- Hades, from the Bone Codex - "Demon Waters of Adunamar"
The lake's surface to a depth of several hundred feet is the hunting area of water nymphs; vile creatures preying as much on each other as others. Some are powerful spell-casters with minions dominated through witchery or otherwise "convinced" to do their bidding. Vul Lom's southern depths are patrolled by the kuo-toa of Zoethall, while the northern parts are under the watch of aboleth satraps in a constant state of conflict.