In the beinging, before tchorts deal. The MC was fighting teh knights, he wound up getting stabbed in the back, and one of the knights put the collar on him.
Not exactly sure why they did that, now that I think about it- He was already dying, impaled on a sword and they were going to actually bury his ass. why the hell did they put a spirit enchanted collar on a soon to be dead guy?
oh well, at leats the aesetic is nice.