The Dark Brotherhood in Skyrim

In Skyrim or in oblivion, you kill, eventually you will kill somebody they assume and you do. I know exactly who I go to to kill a stable hand because he does nothing besides feed me from a vampire. And I go kill him and then sleep in his bed until a nice invisible man named Lucian Le Chance shows up to offer me membership in the Dark Brotherhood. You can get if you use a completed quest the right way. He was murdered by members of the Black Hand that had survived wrongfully. It was it was very disappointing. The guy who was trying to do it all to kill the Night Mother just ran up to her and tried to attack her with a standard eb