How bad is it? Pretty damn bad.
Should you see it? No.
Adam West gets top billing, though he's only in 10 minutes of this film. A reporter, a detective and a professor (West) uncover that the killings attributed to a psychopath released from an insane asylum are really the work of a Babylonian demon. There's an interesting music score, but much of the sound is unsynched. The real killer is seen wearing high heels and there's only two actresses in the cast, so it doesn't take much to figure this one out. The cops don't make the obvious connection between victims, there's a poor demon mask seen only briefly in poor lighting and the demon is rather easily dispatched by beheading with an obviously plastic sword. The plot and acting are poor, the direction and camerawork marginal.