Hello,
I just read an article about a Chilean Indian warchief named Galvarino that has to be read to be believed - over the top because it appears to be historical fact.
Follow the link and be aware that the writer's style is a bit pedestrian.
http://www.badassoftheweek.com/galvarino.htmlGranted this is way before the time of the Witch Hunter campaign, but having the ghost/spirit of this lunatic warrior raised by necromancers or witches (or your foe d'jur) makes him available for your cadre to face off.