The Slaving Empire is the vast and complex clandestine empire of slavers, rival of the traditional Slavers Guild, that the Champion of Slavery runs with his eight Slaver Servitors:

the Chainsmith
the Nine-Eyed Overseer
the Husbander
the Lady's Guard
the Bondsmage
the Manhunter
the Cagemaker
the Specialist - deceased, died in the Age of Hours (Genfyllid's contact)
the Collector

The Manhunter serves as Hand.