Malbraxis was born into the Desimire family many years past in Cheliax. When the house began its rise in political power, it cleansed itself of undesireables. Malbraxis, the offspring of Kangris Desimire (a powerful conjurer) and a succubus, fled the knives of assassins with his father into Osirion.
Kangris trained his son as best as he could, and had him training in alchemy when the assassins finally caught up to them some years later. Malbraxis fled their home and took up as an alchemists assistant in Absalom, swearing vengeance for taking away his birthright as a noble and destroying his immediate family.
During his stay in Absalom, the alchemist he assisted was a kind and goodly soul, and swayed the young magician from the path of depraivity and utter evil.
Malbraxis later became a wanderer, working for a short time the the aspis consourtium, before deciding their goals were short sighted and they were lead by fools. This led him to believe as a Pathfinder, he would better achieve his goal of vengeance and power.