Chaos in the Old World
The imperial authorities legislate heavily against heresy, and employ witch hunters to sniff out the worshippers of dark gods. Sanctioned witchhunters are members of The Holy Order of the Templars of Sigmar, a militant arm of the Cult of Sigmar.
Not even the priesthood or the state is above suspicion of heresy, and this arrangement ensures neither can prejudice the witchhunters’ investigations. Witchhunters are the secret police of the Emperor. They have complete authority- torture is a common method of interrogation, and public burnings the common execution.
Many Empire folk fear witchhunters, and rightly so, for some have been known to condemn entire villages to flame on account of a single transgression. Witchhunters protect the Empire with great zeal and honour, and rarely do heretics escape their clutches."
Thou shalt not suffer a witch to live. And thou shalt not piss off a witchhunter.