Typhus, also known as "Typhus the Traveller" and the "Herald of Nurgle," originally the Space Marine named Calas Typhon of the world of Barbarus, is the Death Guard Lord of the Death Guard Traitor Legion's 1st Plague Company, and the host of the terrible plague known as the Destroyer Hive. He is a Champion of Nurgle, a Death Guard Sorcerer and the former first captain of the Death Guard Legion. Typhus is also the most feared of all Chaos Lords to command one of the legendary Plague Fleets.
That Typhus has been truly blessed by Nurgle is indisputable. When the Death Guard were adrift in the Warp during the Horus Heresy, dying from the Destroyer Plague, Calas Typhon, First Captain of the XIV Legion, absorbed the full power of the disease, becoming a vessel for this ultimate corruption. Swelling in size, his skin and armour bonded. Great pestilential funnels grew from his body, spewing forth a miasma of destruction. Calas Typhon has been transformed into Typhus, Host of the Destroyer Hive.