The Fearsome Foursome is a fictional supervillain group, appearing in American comic books, it included which  fictional character, a supervillain appearing in American comic books published by Marvel Comics?
Klaw (Marvel Comics) Klaw (Ulysses Klaue) is a fictional character, a supervillain appearing in American comic books published by Marvel Comics. He is depicted as a human physicist who has been transformed into solid sound, and who wears a sonic emitter on his right wrist as a prosthetic device. He has often been shown in conflict with the Fantastic Four and the Avengers and is an enemy of the Black Panther and Ka-Zar.
Mojo (comics) Mojo is a fictional character, a supervillain appearing in books published by Marvel Comics, usually those featuring the X-Men family of characters. Created by writer Ann Nocenti and artist Arthur Adams, Mojo first appeared in "Longshot" #4 (December 1985), as the titular hero's archenemy, and subsequently a villain to the X-Men and their various sub-groups as well.