Bio

Like all Symbiote, Carnage has become pregnant, but felt only hatred and fear for his new "son" because of it's potential to become stronger that it's predecessors. Venom sense Carnage's "pregnancy", so he tract him out and talked about the spawn. But Carnage doesn't want to talk about it and fought Venom. Carnage was ready to kill his powerful child as soon as it was born. When he did give birth, however, he was too weak to actually kill it. He tried to blow it up, and bury it, but to no avail. He would eventually put his symbiote spawn to an NYPD officer, Patrick Mulligan, hoping to destroy the symbiote later when he regained his strength.

Prior to the recent events above, Patrick Mulligan is a cop who lives with his family, a wife and a son. Carnage attached his "child" to Patrick and left. Carnage attempted to kill Toxin again, but was prevented from doing so by Venom, who wanted to train it and make it his ally. Venom fought Carnage, and named the new symbiote Toxin, after himself.

After Carnage attacked his wife and child, Patrick left them, realizing what a danger he would be to them if he stayed. Venom, now realizing that Toxin's host is a cop and will likely become a good guy, Allied himself with his son, Carnage to kill Toxin. But in the final battle between the three symbiotes, Toxin defeated them both and his "parents" fled.

Spider-Man stumbled into the final confrontation between the symbiote trinity, and helped Toxin. After they fended off Venom and Carnage, Toxin had a conversation with Spider-Man, filling him in on what had happened to him. Spider-Man gave him a kind of superhero heart-to-heart, and passed on his Uncle Ben's message: "With Great Power Comes Great Responsibility." Toxin resigned himself to a life of battling his base symbiote urges to indulge in violence and destruction, while trying to harness his power for good.

In 2005, after Spider-Man joined the Avengers, Marvel started a six-issue Toxin limited series, which charts Toxin's battles with various supervillains who had escaped from the Raft as a result of the events beginning The New Avengers series, as well as his constant battle to keep the Toxin symbiote under control, as unlike Venom and Carnage, the host and symbiote minds stayed separate in Toxin, and they even had conversations and arguments with each other. Unlike his "grandfather" Venom, Toxin does not refer to himself as "we". Throughout the course of the mini-series, he battled King Cobra, The The Answer, Wrecker, Piledriver, and Razorfist.

Toxin found Cobra in a hotel room. When Cobra tried to wrap himself around Toxin, Toxin grew, stretching Cobra beyond his limit.

Toxin found Razorfist starting a cult of children in the sewers of New York City, using them as his slaves. Patrick searched for and found Razorfist, but because of an argument with Toxin, Toxin refused to help until Patrick admitted that he needed Toxin, even going so far as to turn Patrick into a small, middle-aged man. Once Patrick admitted it, however, Toxin emerged and battled Razorfist briefly, before escaping.

At one point, trying to live with Toxin becomes too much for Pat, and he attempts to commit suicide as advised by the Answer, by throwing himself in front of a train. Toxin interferes at the last moment, saving Pat and claiming that deep down, Pat didn't really want to die. When Pat presses the issue, however, it becomes clear that, unlike the Venom and Carnage symbiotes, Toxin is not sure it could survive on its own and find a new host.

Wrecker and Piledriver decided to pull an art heist. Toxin stopped them, but not before they demolished the museum.

Toxin showed very childlike behaviors, such as throwing a tantrum and breaking Patrick's laptop. He then stole a stack of laptops to replace the one he broke, however, Spider-Man ran into him as he was running away with them, and stopped the theft.

Toxin ran into Razorfist again, now training an army of small children, dubbed the "Piranha Tots" to kill their family members. He finally defeated him by removing his razor fists, and left with only stumps, was unable to harm Toxin.

It was in this limited series that Razor Fist murders Patrick Mulligan's father, but Pat/Toxin begin to show true signs of a hero. He tracks Razor Fist down, but instead of slaughtering him as both the symbiote and Razor Fist himself urge, he controls himself and turns Razor Fist over to the police.

At the end of the limited series, we see Pat reconcile with his estranged wife Gina, by 'introducing' her to the Toxin symbiote as way of explaining why he walked out on his family.

To add to this story Toxin begins to fight side by side with Spider-man. However he begins to crave eating people's brains like Venom. He leaves Gina and New York without an explantion.

Powers

Toxin possesses the abilities of his two predecessors; He can stick to walls, can change shape into a different person, and also has unlimited webbing, which takes on a shape of thick red and blue tendrils, and look somewhat like chains of the Ghost Rider. Toxin can also blend in with his surroundings extremely effectively, and he can form solid weapons from his limbs like his father. Toxin also has a healing factor like his predecessors. Unlike the others, Toxin can track anyone, not just other symbiotes, as long as he has something to pick up a scent.

Also unlike other symbiotes, Toxin appears to be somewhat resistant to sonic waves and heat. Another difference is that Toxin, while dependent upon it's host, does not appear to have bonded with him. In fact, Toxin and Patrick Mulligan will often converse while in their human form. Toxin's eyes are sometimes transparent, showing Patrick's eyes underneath. When he's not angry or fighting, Toxin is slim and smooth-lined, although still well muscled, closely resembling Carnage or Spider-Man in his Symbiote costume. When he becomes upset or aggressive, he grows into his much bigger and stronger form, with vicious fangs and long curving claws.