Amstein Vulg was once an engine-master aboard the Rogue Trader Elucia Vhane's New Dawn vessel, until it was struck by the Chaos God Nurgle's Gellerpox plague. The plague horribly mutates those infected by it and the Gellerpox turned Vulgrar into a three headed, multi-limbed monstrosity with a belly-flamer and flesh-ripping claws. His new other two heads were his former first mates fused to his own body. He also gained extra limbs and the ability to skin graft weapons onto his body, merging both man and machine. His belly-flamer was his strongest weapon and he only used it when confronted by two dozen voidsmen. Using his belly-flamer he engulfed them all in fire, and their bones still fuel his belly to this day. Afterwards he took command of the large number of crew members that were also mutated by the Gellerpox and now seeks to kill or infect those who escaped the plague's touch, before they could escape the doomed vessel.