Sweet Mother, Sweet Mother, Send Your Child unto Me, for the Sins of the Unworthy must be Baptised in Blood and Fear. -The Black Sacrament

The Dark Brotherhood is a guild of assassins shrouded in shadow and mystery. The Brotherhood can be found all over Tamriel and, although their business is certainly not legal, they are almost universally tolerated. 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 were once connected to the Morag Tong, but since their split in the Second Era the two groups have become bitter rivals. The Brotherhood is also known for their worship of Sithis.

Diety: Sithis
Supreme Leader: The Night Mother

===========The Black Hand============

Listener: Smetana

Speaker: Akenjel
Speaker:
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=========Ranks of the Brotherhood========
Silencer -
Executioner -
Assassin -
Eliminator -
Slayer -
Murderer -

The 5 Tenets.[elderscrolls.wikia.com]
Dark Brotherhood Armor