The film's origins are shrouded in mystery. According to urban legend, "Antrum" was created in the 1970s by two rogue filmmakers who allegedly made a pact with the devil to produce a movie that would drive viewers mad. The supposed goal was to craft a film so disturbing that it would become a form of mind control, inducing a trance-like state in those who dared to watch it. However, this narrative has been disputed, and the actual production details remain unclear.