Carnage is a fictional supervillain appearing in American comic books published by Marvel Comics, usually depicted as an enemy of Spider-Man and the offspring and archenemy of Venom. The character first appeared in The Amazing Spider-Man #361 (Apr 1992), and was created by writer David Michelinie and artist Mark Bagley, although the first published artwork of Carnage was penciled by Chris Marrinan. Carnage belongs to a race of amorphous extraterrestrial parasites known as Symbiotes, which form a symbiotic bond with their hosts and give them super-human abilities. The Carnage symbiote is usually depicted as an offspring of Venom that is more powerful than him due to the symbiotes' nature, and is much more sociopathic and sadistic. Like Venom, Carnage has had multiple hosts over the years, but his most infamous one remains his first, serial killer Cletus Kasady, whose personality perfectly matches that of the symbiote. Other hosts include Ben Reilly, Karl Malus, and Norman Osborn.
Source: Wikipedia, "[en.wikipedia.org/wiki/Carnage_%28comics%29 Carnage (comics)]", available under the CC-BY-SA License.