Need to exorcise a demon or monster from another dimension? Well, there's God only knows how many experts you could go to - Dr. Strange, Dr. Fate, Dr. Occult, etc. But if you need to eliminate a large army of demons in a short amount of time, you might need a specialist. And that's where Dr. Reinigend comes in. A former Nazi scientist who spent the bulk of WWII figuring out genocidal applications for magic, the doctor is the ultimate authority on exterminating hordes of demons, and now works for a black ops unit code-named Merkwurdigscheiss, which deals with . He approaches exorcism the way that the Nazis approached the extermination of their victims: efficiency over ethics. He sees nothing wrong with using spells that wipe out whole neighborhoods if it eliminates a few elusive demons. Thank god he's on our side... right?
(Just a weird idea that came into my head. A completely evil bastard who might be needed in an emergency...)