By Calley Lamar For the last entry into our look at giant monsters that have had an impact upon cinema, we now look at Godzilla’s greatest enemy: King Ghidorah, the Three-Headed Monster. Even if you’ve never seen a Godzilla movie in your life, there is a chance you have at least passing knowledge of King Ghidorah, who comprises Toho’s “Big Five” monsters (Godzilla, Mothra, Rodan, Mechagodzilla,…