I'm not saying it's Darkin...
"One of those 'holies' is a relic that once belonged to the emperor’s personal spirit-banisher, Carikkan. Looks like he used to bind troublesome entities into inanimate objects, and use them for his own dark purposes."
But it's Darkin.
Or at least Darkin-inspired.
Carikkan probably figured if Targon can turn people into powerful weapons and use them for whatever they want, how can he get in on that action?