Toxin is a fictional character appearing in American comic books published by Marvel Comics. He has been depicted as a superhero and at times a supervillain. The character is the offspring of Carnage, the third major symbiote in the Marvel Universe, the ninth known to have appeared in the comics outside of the Planet of the Symbiotes storyline, and the first symbiote that Spider-Man considers an ally, despite several temporary alliances with Venom in the past. The Toxin symbiote's various hosts are former NYPD police officer Patrick Mulligan, Eddie Brock, teenager Bren Waters and Rick Jones.