The Ashtongue Deathsworn is a Burning Crusade faction that involves Black Temple. In order for players to become Neutral with the Ashtongue Deathsworn they will first need to complete a very long quest line. Depending on your Faction (Aldor or Scryer) will determine which quest you get to start it.
When running Black Temple players will recieve reputation for killing both the trash as well as. Both the bosses and trash will continually grant reputation up until exalted. Players will net roughly 8k reputation per run, requiring them to run the instance 5 to 6 times.