Watcher's Keep

Watcher's Keep is an ancient castle south of Amn. It has withstand the age very well and all in all the keep is still in a good shape.

History
It is told that the keep was built long ago as a prison for the most dangerous and evil creatures, of which the gods themselves wanted that they became imprisoned. But the keep was empty for many centuries until the Time of Troubles began. During this turbulent year the god Helm decided to use the ruin once again. He imprisoned some unspeakable evil, only known as the Imprisoned One, into the dungeon and gave his knights the order to guard it and let it never escape. But during the next years the magical wards who held the Imprisoned One there began to loose their powers until even the knights could not the keep. They began to spread news throughout the lands to lure some adventurers to the keep promising rewards for helping them.

Imprisoned One
The Imprisoned One was Demogorgon the demon prince and ruler of 88th layer of the Abyss.

In the game Baldur’s Gate II: Throne of Bhaal
The Player must fight through the five levels of this dungeon and withstand its traps and inhabitants. In the end he will met the Imprisoned One and had to decide if he uses a scroll, given to him by the knights, to strengthen the wards and let the demon imprisoned. Or he decides to fight and kill the demon which will however free Demorgorgon from his imprisonment.

Reference


Watcher's Keep