The primary enemies of the Bureau are Oddman, a former left-wing terrorist cell, turned mercenary. All of these magic users, even the ones with innocent and well-meaning intentions, are in danger of tapping into the dark side either accidentally or on purpose and themselves becoming bloodthirsty beasts due to accidents or sabotage by Oddman's agents. These Sorcerist agents wear a suit of armor that resists the negative transforming effects of magic. These suits are referred to as "Mold Armor", or more commonly a "straitjacket", due to the fact they constrain human beings in their natural form. The Sorcerists also use magically-tainted bullets from large hand-carried railguns powered by a combination of steam and magic, which are the only weapons capable of effectively stopping the magically-transformed monsters.