The Blighted Claw
Originally known as the Sanctors of Terra, they were among the thirty Chapters corrupted during the Abyssal Crusade. Now led by their former Chapter Master Paramyx, they have dedicated themselves to spreading Nurgle's plagues amongst the worlds of the Imperium.
One of their deeds was the incursion on the planet Gehöft where, with the might of the Daemonic legions of Nurgle and virulent Zombie Plague, they inflicting heavy losses to the united army of the White Scars, Dark Angels and Brindelweld Seventeenth Imperial Guard Regiment and forced the Imperium to bring down the Exterminatus on the unfortunate planet. Paramyx managed to escape the retribution.