Ibac's alter-ego is Stanley "Stinky" Printwhistle, a crook who attempts to blow up a bridge, but is caught in the explosion and thrown off due to Captain Marvel. He is saved by Lucifer, who offers Printwhistle the chance to become a champion of evil and defeat Captain Marvel in exchange for his mortal soul. Printwhistle accepts, Lucifer summons up four historical villains, and Printwhistle is told to speak the magic word "IBAC". By doing so, the frail, grey-haired criminal transforms into Ibac, a brutal muscleman with a buzz cut. Saying "IBAC" again transforms Ibac back into Printwhistle.