Zheng Zu, originally known as Fu Manchu, is a supervillain appearing in American comic books published by Marvel Comics. Based on Sax Rohmer's character of the same name, he is the leader of the Five Weapons Society criminal organization and the father and arch-enemy of Shang-Chi.

Fin Fang Foom is a fictional character appearing in American comic books published by Marvel Comics. The character has been depicted as an extraterrestrial creature resembling a dragon. The character first appeared in Strange Tales #89, and was created by Stan Lee and Jack Kirby. Later, the character becomes part of the superhero Iron Man's rogues gallery.