Typhus' original name was Calas Typhon, and he hailed from the Death Guard's eventual homeworld of Barbarus.
Typhon possessed the blood of the warlords that had ruled the planet before being defeated by Mortarion, the Death Guard Primarch.
He also possessed formidable psychic powers and had already sold his soul to the Dark Gods of Chaos.
With their aid, Typhon became the First Captain of the Death Guard and commander of the battleship Terminus Est.
When Mortarion joined Horus in his rebellion, Typhon killed the Navigators who remained loyal to the Emperor and assured his Primarch that he could lead them to Terra.
Instead, he led them into a trap - becalming the Death Guard fleet in the warp, adrift, helpless and at the mercy of Chaos.
Then came the Destroyer Plague and the Death Guard were struck down, but Typhon received his reward from Grandfather Nurgle and he absorbed the full power of the plague.
His body became home to the flies of Nurgle, his armor a hive of pestilence.
He then became Typhus, Herald of Nurgle and the Host of the Destroyer Hive.
Weapons and Abilities
Typhus is a formidable psyker favored by Nurgle, able to call forth both Nurgle's Rot and the Wind of Chaos psychic powers. In addition to his Manreaper Daemon weapon, his body is host to the Destroyer Hive; a horrific plague that manifests as a swarm of insects that continuously pour from the cracks and vents in his Terminator armor.