Dark Jedi Master is the fourteenth rank in the Dark Brotherhood, which is awarded after demonstrating above and beyond performance as a Dark Side Adept.
It is the second rank in the Elder class, the second step down the path to Grand Master.
Promotion past this rank is determined by the Grand Master or his Deputy when a promotion is warranted based on performance and activity.
Upon promotion by the Grand Master or his Deputy, you will reach the final Elder class rank of Dark Prophet.
Trivia