Rise of the Twilight Empire
The professional army of slavetakers in service to the House of Chains. This military unit dates back several centuries, when it was formed by the Empire of Nerath to serve as harriers and skirmishers. When the empire fell, they pledged their service to the House of Chains and turned on the populace they once protected.
While they are vicious, they are not particularly disciplined, nor particularly well suited to fighting in pitched lines since most of their experience is with raiding lightly defended peasants and minor nobility. After the War of Chains, they absorbed most members of the Iron Circle, so they number about 1,500 strong. Their rank and file accept any thief or cutthroat willing to spread human misery for coin. Most are human, though there are a small handful of other races in their ranks.
Their captains, however, are members of a tiefling bloodline known as the Scions of Moloch. They combine strength of arms with dark sorcery, and are a match for a dozen men. They are paid in both flesh and gold, as a captain is allowed to keep every 20th slave they take for themselves.