A knife fighter without peer on Necromunda, Mustaine made more than his fair share of enemies both outside and within the Death Blades. Upon recruitment into the guard, Mustaine was given a leadership role, but failed to conform to the expectations of regimental command. However his strong survival instinct and unprecedented lethality meant that he was able to avoid the ultimate penalty.
Nevertheless he has not escaped unscathed from sancture, and his wild reputation, prolific combat drug use, and sheer arrogance has resulted in him effectively being relieved of any command duties.
This fact, plus issues associated with the long term use of frenzon, slaught and other combat stimms has resulted in Mustaine withdrawing from the day to day affairs of the regiment, being rarely seen and even more rarely heard during down times. However a reputation for lethality approaching legendary status within the regiment, and having honed his ability to infiltrate and strike from the shadows to extraordinary levels, means that Mustaine remains a valuable asset on the battlefield when the Death Blades engage.