Rifts - Pathway to Oblivion
Larry Cultsman is a former member of this well known Mercenary group. The mystic Knights are cold hearted killers, who are renown for always fulfilling a contract and never showing any mercy. They are feared for their powerful mystical and Psychic abilities as well as their resistance to energy.
There are rumors of a subgroup of Mystic Knights who try to be heroes, but they Mystic Knights themselves work hard to squash any of these rumors with murder and cruelty.