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Extrembiote (Earth-616) from King in Black Vol 1 2 001

Being mutated by Extremis

Originally one of an army of Symbiote Dragons brought by the symbiote god Knull during his invasion of Earth, this symbiote was targeted by Iron Man when the Armored Avenger was attempting to collect a symbiote to save the life of Eddie Brock, who had been near-fatally injured by Knull after being stripped of the Venom symbiote. Using a dose of the techno-organic virus Extremis, Iron Man attempted to rewrite the symbiote dragon's DNA to sever its connection from Knull's Hive. In the process of subduing the symbiote, the creature infused itself into Iron Man's Model 70 Armor. Iron Man would then attempt to bond Eddie Brock to a portion of the symbiote, but the gambit failed since the symbiote remained connected to Knull, and Brock died.[2]

Eddie's son Dylan Brock was able to sever the symbiote's connection to the Hive-Mind, granting Iron Man full control over it. When Knull, wounded by Thor Odinson, ordered the symbiote-possessed Celestials to raze Manhattan, Iron Man used his symbiote to hijack control of one of them.[7] Stark returned to a version of his armor without a symbiote following Knull's defeat,[8] and placed the Extremis-augmented symbiote-armor, which he dubbed the "Extrembiote," into storage in his lab. Stark later showed it to Flash Thompson, who warned him that he shouldn't treat it as a mere suit of armor and wouldn't be able to control it forever, though Stark disregarded this, citing Flash's apparent ability to control his own symbiote.[9]

King in Black Vol 1 2 Second Printing Variant Textless

Bonded to Iron Man

Wanting to test the Extrembiote's capabilities as well as help out in the fight against Carnage, Tony Stark bonded to it and used it to separate Arthur Krane from the Carnage symbiote. However, Cletus' codex called out to the Extrembiote from within the Hive-Mind, mocking Tony for thinking he could control it and causing it to break his arms and several ribs. Carnage merged with the Extrembiote but was stopped from killing Tony by Agent Anti-Venom, transforming into a symbiote-dragon and flying away while gloating that he was victorious.[4] At some point afterwards, Cletus' codex and the Carnage symbiote had a falling out and he expelled it from the Extrembiote,[1] opting to keep it as his new avatar.[10] Cletus subsequently returned to St. Estes Home for Boys and merged the Extrembiote with the crumbling ruins, turning the building into an extension of himself whose interior he could reshape at will.[5]

Cletus Kasady (Earth-616), Carnage (Symbiote) (Earth-616), and Extrembiote (Earth-616) from Carnage Vol 3 11 001

Assimilated by Carnage

Visited by Kenneth Neely, Cletus learned that the Carnage symbiote had succeeded in its quest to become a god and refused to help stop it, not wanting to leave the "perfect" world he had created using the Extrembiote. As Cletus was about to kill him, Neely goaded him by saying he had become a bystander and that people saw him as nothing without Carnage, prompting Cletus to transform the Extrembiote into a Carnage-ized suit of biomechanical armor and set out to teach the world to fear him again.[1] Cletus obliged by attacking Todd's Diner in Brooklyn,[11] devouring the people inside and assimilating the building with the Extrembiote when the NYPD and Spider-Man (Miles Morales) became involved. NYPD Agent Gao's Cape Killers were torn apart and eaten by copies of Cletus manifested from the Extrembiote, though Spider-Man overloaded the Extrembiote's arc reactor with his Venom Touch to save the Scorpion.[12]

Carnage Vol 3 12 Textless

Controlled by Cletus Kasady's codex.

As the diner collapsed in the wake of the Arc Reactor overloading, Cletus and Ken Neely retreated to the former's old lair in the Grand Street subway station to plan their next move,[13] attacking Stark Unlimited's corporate HQ in the hopes of obtaining a replacement Arc Reactor. Informed that this would be impossible due to Tony Stark having been ousted as the CEO, Cletus vented his frustration by killing several of the scientists and then assimilating Stark Sentinel components into the Extrembiote to replace the damaged Model 70 Armor, enabling him to hack into Stark Unlimited's network and take control of anyone with a Stark-brand smartphone. Cletus "rewarded" Kenneth for his loyalty by bonding him to an offshoot of the Extrembiote, imbuing it with a copy of his consciousness that seized control of Kenneth's body,[3] though it was torn off and assimilated by the Rascal symbiote.[14] Transforming the Extrembiote into a giant cyborg symbiote-dragon using the remaining Iron Man tech at his disposal, Cletus dispatched offshoots merged with suits of Iron Man to take over a trio of fanboys,[15] using them as batteries and backup when Iron Man himself showed up with a new suit, the Dragon-Slayer Armor.[16]

Cletus Kasady (Earth-616), Extrembiote (Earth-616), Anthony Stark (Earth-616) and Miles Morales (Earth-1610) from Carnage Reigns Omega Vol 1 1 002

The Extrembiote's final dragon form

With Miles outfitted with a suit of Iron Spider Armor after being mortally wounded, Cletus re-absorbed all of the offshoots of the Extrembiote to power himself up and killed Kenneth Neely. Within the Symbiote Hive-Mind, Kenneth's codex nagged Cletus that he would always be incomplete without the real Carnage symbiote. Cletus decided to leave Earth to rejoin with Carnage and become a god, but was distracted by Miles long enough for Iron Man to ram into his body and detonate an EMP from within, which destroyed all but a small piece of the Extrembiote.[17] Kasady was eventually restored to his human body, but without any symbiote, leaving the Extrembiote's fate unknown.[18]

Iterations and Offshoots[]

Cletus Kasady (Earth-616), Extrembiote (Earth-616) and Kenneth Neely (Earth-616) from Red Goblin Vol 1 5 001

Kenneth Neely's first offshoot

Having become an extension of the Carnage symbiote, the Extrembiote is capable of producing offshoots.[3]

  • "Junkers" - A set of offshoots combined with Iron Man armor, they were bonded to fans of Cletus Kasady so the suits could use their bodies as batteries. After their destruction one piece of an ofshoot bonded to Kenneth Neely's arm. Cletus went on to absorb all of the offshoots back into the Extrembiote.[17]



Cyborg Symbiote Physiology: As a creation of Knull, the Extrembiote possessed immense powers like other Symbiote Dragons. Following its infusion with the Extremis virus and merging with a suit of Iron Man's Model 70 armor, the Extrembiote also developed new powers.[2]

  • Constituent-Matter Manipulation Like other symbiotes, the Extrembiote is capable of manifesting tendrils from its biomass, using them to attack prey.[6]
  • Cleansing Beam: As a result of its mutation with Extremis and its merging to the Iron Man Armor, the Extrembiote gained the ability to project repulsor blasts capable of cleansing Knull's corruption off one of his victims.[6]
  • Possession: Iron Man managed to use the Extrembiote to override Knull's symbiotic possession of a Celestial, taking full possession of the cosmic being himself.[7]
  • Shapeshifting: While it primarily resembled a black-and-yellow Gigeresque version of Iron Man's Model 70 armor, the Extrembiote was capable of returning to its draconic form at its host's command.[7]



  • When it bonded to Tony Stark, the text on his armor's HUD changed to the symbiote language and Knull's spiral emblem appeared on Tony's forehead.[2]

See Also

Links and References