Brock ultimately sacrifices the Toxin symbiote in the final issue against Chthon. Bren Waters Toxin returns during the King in Black tie-in miniseries Planet of the Symbiotes. Toxin has now bonded with a new host, teenager Bren Waters, the son of the new Guardsman (Ozkar Waters); the two have a brief scuffle. Powers and abilities The Toxin symbiote possessed the special abilities of his two symbiote predecessors: he can stick to walls (which originally came from when Spider-Man was a host of the Venom symbiote), can change his identity to that of a completely different person, and also has unlimited webbing. With Patrick Mulligan as the host, Toxin is red from the abdomen up and black from the abdomen down. With Eddie Brock as the host, Toxin resembles a combination of Venom and Carnage but with the entire body red—light on the chest, and dark on the arms and lower body.<ref>{{Cite book|title=Venom #31|last=Bunn|first=Cullen|publisher=Marvel|year=2011}}</ref> Toxin can also blend in with his surroundings and become undetectable, an ability he gained from his grandfather Venom, and he can form solid weapons from his limbs, an ability first seen in his father Carnage. Toxin also seems to have some sort of quick-healing ability like his predecessors, as his wounds from his first battle with Razor Fist healed remarkably quickly. Unlike the others, Toxin can track anyone—not just other symbiotes or symbiote host—within the entire city of New York and possibly farther, as long as he has something to begin from. Unlike many of the other symbiotes, Toxin did not try to take over the mind of his human host. Instead, the Toxin symbiote actually thinks and voices its opinions to the human host (as evidenced in Toxin's "Cut to the Chase" storyline). The Toxin symbiote usually speaks when the host is in his "human form", and acts very immature and childlike because of its nascent existence, once refusing to aid Pat in battle until he apologized for an earlier argument. In addition, he seems to have a stronger resistance to sonics and intense heat compared to Carnage, though this does not mean that Toxin is more resistant to violent urges: it can get carried away with violence and fighting crime, even if it is a petty crime. When he is not angry or fighting, Toxin is slim and smooth-lined, although still well muscled, closely resembling Carnage or Spider-Man's symbiote costume. When he becomes upset