Toxin: the third symbiote, more powerful than Venom and Carnage

Among the symbiotes that have shaped Spider-Man's universe, two names tower over all the rest: Venom and Carnage. But there is a third symbiote, born directly from Carnage, whose potential theoretically surpasses that of both his ancestors combined: Toxin. Stronger than Venom, more stable than Carnage, and above all carrying a rare moral ambiguity — Toxin is the symbiote that could have become a hero. His story, that of police officer Patrick Mulligan and then of other hosts, is one of the most fascinating and least known in the whole symbiote saga. Here is the complete portrait of Venom's 'grandson'.

The birth of Toxin: Carnage's offspring

To understand Toxin, you have to trace the symbiotes' family tree back. The original black symbiote bonded with Spider-Man before becoming Venom with Eddie Brock. Venom then spawned an offspring that, on bonding with the serial killer Cletus Kasady, became Carnage. Toxin is Carnage's child — and therefore the 'grandson' of the original symbiote.

First appearing in 2004 in the miniseries Venom vs. Carnage, written by Peter Milligan, Toxin is born in dramatic circumstances. Carnage, aware that his own offspring could pose a threat to him, tries to kill the newborn symbiote the moment it appears. That is the whole paradox of Toxin: he is rejected and hunted by his own 'father' Carnage, while Venom, the 'grandfather', tries instead to recover him and turn him into an ally. The infant symbiote therefore finds himself at the heart of a family war between the two most dangerous symbiotes in the Marvel universe.

This lineage is no minor detail. According to symbiote mythology, each generation is more powerful than the last. If Venom is stronger than the original symbiote and Carnage more powerful than Venom, then Toxin — the third generation — theoretically holds greater potential than both his ancestors. That is what makes him an entity as coveted as he is feared.

Toxin's father

Cletus Kasady as Carnage Figurine

Carnage spawned Toxin — then tried to destroy him. This collector's figurine captures every ounce of the scarlet madness of the symbiote that gave rise to the most powerful of the bloodline.

€99.90 View the figurine

Patrick Mulligan: the police officer who becomes the symbiote

Toxin's first host is Patrick Mulligan, a New York police officer, a husband and a father-to-be. His encounter with the newborn symbiote makes him the bearer of an entity of phenomenal power — but also the guardian of a being that could have become a weapon of mass destruction. Choosing a police officer as the host is central: unlike Eddie Brock, eaten up by resentment, or Cletus Kasady, a pure nihilist, Mulligan is a fundamentally good man, devoted to protecting others.

That goodness in the host changes everything. Venom, alarmed by Toxin's birth, gives Mulligan a paradoxical piece of advice: he tells him that the way he raises the symbiote will determine what it becomes. If Mulligan passes his values on to the symbiote, Toxin could become a force for good; if he fails, Toxin will become the universe's worst nightmare. The Toxin symbiote thus becomes a metaphor for upbringing and moral transmission — a rare and profound theme in the usually violent register of symbiote stories.

Mulligan constantly fights to stay in control. The symbiote pushes him towards violence, whispers radical solutions to him and permanently threatens to overwhelm his will. That inner tension between the man of integrity and the predatory entity places Toxin in the great tradition of the struggle between the human and the monster, already explored in the relationship between Spider-Man and the black symbiote. But with Toxin the stakes are even higher: it is not just about surviving, but about shaping the soul of an all-powerful being.

Powers greater than Venom's and Carnage's

Toxin has every one of the classic symbiote abilities — superhuman strength, organic tentacles and blades, camouflage, wall-crawling and accelerated healing. But he pushes them to a higher level, in keeping with the generational logic of the symbiotes. Where Venom and Carnage are undetectable by Spider-Man's spider-sense, Toxin shares that immunity, which makes him an opponent the web-slinger cannot feel coming.

Toxin also has unique abilities that neither Venom nor Carnage command. He can sense and track other symbiotes from a distance, following their presence like a living radar. His biomass is exceptionally resilient, and his raw power, when fully unleashed, surpasses that of his ancestors. That superiority explains why Carnage was so determined to destroy him at birth and why Venom was so determined to win him over: Toxin represents the peak of symbiote evolution in his bloodline.

That power places him, in the pantheon of the great symbiote threats, close to cosmic entities such as Knull, the god of the symbiotes. Toxin does not have Knull's divine scale, but on Earth he embodies the maximum potential a single symbiote can reach.

Toxin's grandfather

Spider-Man Figurine — Venom

Venom, Eddie Brock's original symbiote, tried to make Toxin an ally against Carnage. The essential piece for any collector of the symbiote bloodline.

€49.90 View the figurine

Toxin, the antihero: the symbiote that wanted to do good

What sets Toxin radically apart from Venom and Carnage is his moral trajectory. Under Patrick Mulligan's control, Toxin acts as a vigilante — fighting crime, protecting the innocent, even standing against Venom and Carnage. He is one of the very few symbiotes to have genuinely worked for good, which makes him an antihero in the purest sense of the word.

That heroic dimension is never permanently secured. Toxin is forever teetering on the edge of the abyss, and depending on the hosts who carry him after Mulligan, he sometimes tips over into violence and destruction. The symbiote, by its very nature, amplifies its bearer's impulses. With a virtuous host it becomes a protector; with a corrupt host it turns back into the monster Carnage feared. That moral plasticity makes Toxin a narratively precious character: he raises the question of whether a being designed for destruction can be redeemed by love and responsibility.

This question of symbiote redemption finds a direct echo in the story of Anti-Venom, Eddie Brock's white symbiote, another striking exploration of the idea that a symbiote can serve the good. Together, Toxin and Anti-Venom form the bright side of a symbiote mythology usually given over to darkness.

The successive hosts: from Mulligan to Eddie Brock

Over the decades, the Toxin symbiote has changed bearers, and each host has bent its nature. After Patrick Mulligan, the symbiote passes through several hands, some heroic, others criminal. One of the most striking turning points comes when Eddie Brock — the former Venom and Anti-Venom — becomes the bearer of Toxin himself for a time. That fusion brings the complete history of the symbiote bloodline together in a single being, creating a character of rare complexity.

These changes of host let the writers explore every facet of Toxin: sometimes a protector, sometimes a threat, sometimes an instrument in the hands of forces greater than himself. In the major symbiote events of the 2010s and 2020s, Toxin regularly appears as a centrepiece, his power making him a coveted asset in the wars between symbiotes. His presence in the arcs tied to the legacy of Maximum Carnage and to modern symbiote conflicts confirms his status as a central figure in this mythology.

Toxin in pop culture and his big-screen potential

With the phenomenal success of the Venom films led by Tom Hardy and the expansion of Sony's symbiote universe, Toxin has become one of the characters fans most want to see in a future adaptation. His nature as the 'third symbiote', his greater power and his moral ambiguity make him an ideal candidate to extend the franchise on the big screen. Speculation about a possible on-screen appearance for Toxin has been running for years.

In the video games and the animated series, Toxin stays more in the background than Venom and Carnage, but his standing among connoisseurs keeps climbing. He embodies what symbiote fans appreciate most: the combination of a spectacular design — a red and black symbiote with patterns even more aggressive than Carnage's — and a psychological depth that goes well beyond the simple monster. Toxin is not just one more creature: he is a living reflection on the nature of good and evil.

The symbiote saga as a poster

Alien Costume Saga Comics Poster

The entire symbiote bloodline starts with the alien costume. This collector's poster pays tribute to the saga that spawned Venom, Carnage and their descendants all the way to Toxin.

€22.90 View the poster

Why Toxin deserves his place among the great symbiotes

Toxin suffers an injustice: overshadowed by the crushing fame of Venom and Carnage, he remains little known to the general public even though he is, on paper, the most powerful of the three. That obscurity is exactly what makes him so rewarding to rediscover. Toxin is not a simple variation on the violent-symbiote theme — he is its culmination and its surpassing, the symbiote that asks the question neither Venom nor Carnage ever really asked: what if a symbiote could choose good?

His story — that of an infant hunted by his father, raised by an honest police officer, passed between heroic and criminal hosts — is a reflection on nature and nurture, on moral transmission, on the possible redemption of beings designed to destroy. In a symbiote mythology often reduced to an escalation of violence, Toxin brings a precious shade of grey.

For any fan of the symbiote saga, getting to know Toxin means completing the family tree that runs from Spider-Man's black costume to the modern conflicts of the Marvel Universe. It also means discovering one of the most underrated and most promising characters in the whole of the web-slinger's universe — a character whose best is probably still to come, on the page as much as on screen.

To explore the whole symbiote dynasty, discover the complete history of Venom, the grandfather of the bloodline, and dive into the story of Carnage, the father who tried to destroy Toxin at birth.