Carnage was born when Venom accidentally reproduced on a wanted criminal named Cletus Kasady. He declared a one man war on the world and lost to a team formed by Toxin. However, he survived and continues to combat the resistance.
With Venom now working with the resistance, Carnage has become the Head Symbiote, second in command to Aether. However, he discovered that Aether was manipulating him and he reluctantly swapped sides to the resistance.