A device which enslaves the wearer to the will of the one who places it, a discipline collar causes pleasure and pain within the wearer when complying with or refusing the will of the placer.
Kalare is mentioned as being the source of many of the collars, and indeed Kalarus Brencis developed methods of eliciting additional loyalty and levels of controls from the slaves he collared. He also taught this technique to his son, Kalarus Brencis Minoris. Lord Kalarus also used slaves, broken by the use of these collars since childhood, as elite soldiers during his rebellion. His "immortals", named after an inscription on their discipline collars "Immortalis", were fanatically loyal, all but immune to pain, and used widely for the Assassinations during the Night of Red Stars.