Born to scavenger tribes in Old Albia on Terra, as a young man he joined the Great Crusade in its early days. Initially just a common soldier, over the decades he rose through the ranks and became known for his courage, natural talent, and intelligence, his lifespan aided by bionics. His rise and deeds were overshadowed only by those of the Legio Astartes.
During the Horus Heresy, MaSade was initially in retirement on the Hive World of Agathon. However the Heresy saw him reenter active service, driven by revenge against the traitors. He led a bloody purge against the parliament of elector counts on Agathon after many had attempted to ally with Horus.