Demogorgon

Demogorgon, also known as the Prince of Demons, is a powerful demon lord. The self-proclaimed title is one that is held by virtue of power and influence, which in turn, is a title acknowledged by both mortals and his fellow demons.

Description
Demogorgon appears as an eighteen-foot tall, reptilian (or amphibious) hermaphroditic demon with a somewhat humanoid form. Two baboon heads sprout from his twin snake-like necks, and his arms end in long tentacles. Demogorgon's two heads have individual persona, called Aameul and Hedradiah. They strive to dominate each other, but are unable to achieve control because they are aspects of one another.

Demogorgon can hypnotize with a gaze or drive enemies insane. His whip-like tail has the ability to drain the life energy right out of a living foe. His tentacles cause living creatures to rot away, as if by some sort of rapid leprosy.

Realm
Demogorgon lives on the 88th layer of the Abyss, known as Abysm, the Brine Flats, or Gaping Maw. This is a layer consisting of a great sea of briny water broken by tall, sharp, ugly, rocky prominences rising out of the endless murky water and rising into a sky of yellow mist. Demogorgon's palace is two twin towers shaped very roughly like tightly coiled serpents that are covered with sharp, ugly fin-like features and spines, and crowned at the top with skull-shaped minarets. The two towers are linked by a bridge near the top. Beneath the fortress are reefs and caverns where aboleth, kraken and ixitxachitl dwell, constantly warring with each other and worshipping Demogorgon in his palace above.

The only significant landmass of the layer is a vast continent covered in tropical jungles. Here, Demogorgon's capital city of Lemoriax is located.

Relationships
The hatred between Orcus and Demogorgon is legendary. He is also a dedicated foe of both Graz'zt and Fraz-Urb'luu. Some of his allies include the Succubus Queen Malcanthet; the currently imprisoned Shami-Amourae was his former consort. He is the brother of another demon lord called Mandrillagon.

Cult of Demogorgon
Demogorgon's cult is relatively small compared to "true" deities, but much larger than those of most fiends. He is worshiped not only by evil humans, but also by the intelligent rays known as ixitxachitl.

Baldur's Gate
In the pc game Baldur's Gate II: Shadows of Amn, it is possible to make a sacrifice to Demogorgon, thus summoning some demons with no wish to be friendly.

In the expansion pack Baldur's Gate II: Throne of Bhaal, Demogorgon appears imprisoned in the dungeon known as Watcher's Keep. The player's standard quest is to seal the dungeon in order to keep Demogorgon imprisoned, but the player can also destroy him, sending him back to the Abyss.