[7] Boris Karloff (Frankenstein) headlines this matinee adventure flick about a group of British archaeologists who fight to keep the recently discovered sword and mask of Genghis Khan out of the hands of the evil Fu Manchu, who would harness the items into deadly weapons against humanity. Karloff plays the evil Fu Manchu with indelible glee, supported by an equally creepy performance by Myrna Loy …