This article is about the vanilla Morrowind faction. For the faction in Tribunal, see Dark Brotherhood.
The Dark Brotherhood is a guild of assassins shrouded in shadow and mystery which has been active all over Tamriel. While their business is certainly not legal, their existence has typically been tolerated or ignored. Whenever an individual with legal authority takes an interest in their dealings, the Brotherhood relies upon a combination of bribery, blackmail, coercion, and murder to keep their activities hidden. They have been bitter rivals of the Morag Tong since the Second Era. The Brotherhood is also known for their worship of the Dread Father Sithis. Dark Sisters are accepted into the Brotherhood as equally as Dark Brothers, though members of either gender are often referred to as Brothers.
The Brotherhood also features in the Tribunal expansion, where you will encounter them in Mournhold as part of the main quest. See the Tribunal article for more specific information about their role in the expansion.