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"I'm the Juggernaut, Ain't nothin' — ain't nobody — can beat me!"


  • Height- 9'5"
  • Weight- 1900 lbs
  • Eyes- Blue
  • Hair- Red
  • Citizenship- American


Early Childhood

Cain's parents separated and Cain was eventually sent to a boarding school. Kurt Marko's colleague, Dr. Brian Xavier, another atomic researcher, died in an accident, and Kurt Marko eventually married Xavier's widow Sharon for her great wealth. On marrying Sharon, Kurt Marko moved into her large Westchester County mansion, where he lived with her and her young son Charles. Cain, who had become a cruel and spiteful boy, came to live at the mansion as well.

Cain immediately began bullying his new stepbrother Charles. But Cain was often secretly beaten by his abusive father. Charles' vast telepathic powers were beginning to develop, and on one occasion he found himself experiencing the anguished thoughts and emotions of Cain after Cain had been beaten by his father. The inexperienced young Charles could not control or end his contact with Cain's mind at this time. Somehow Cain sensed that Charles was reading his mind and had discovered his secret shame. Cain believed that Charles had invaded his thoughts deliberately, and from then on Cain regarded Charles as his enemy. Cain was abusive to his stepbrother at every opportunity.

Getting into a disagreement with his father over money, Cain accidentally upset some explosive chemicals and caused a fire to engulf his father's home laboratory. Though Kurt Marko managed to rescue both Cain and Charles from the fire, he himself died of smoke inhalation. Sharon Xavier Marko had died sometime before, tormented by her loveless marriage to Marko. Cain Marko continued to live in the Xavier mansion, growing increasingly resentful of his stepbrother's scholastic and athletic achievements as well as of his telepathic powers, which Xavier mastered as he grew older.

What happened to Marko after he left home is unclear. However, it is known that he became a mercenary and was eventually imprisoned in a Third World jail when the revolutionary forces he was fighting for were defeated. In the jail he became friends with a fellow mercenary, Black Tom Cassidy, who used his mutant powers to help them escape.


Later, Marko and Xavier found themselves serving together in the same U.S. military unit in Korea. Marko deserted under fire and Xavier went after him to bring him back. Xavier followed Marko into a cave that housed the lost secret temple of Cyttorak, a powerful mystical entity. Marko impulsively grabbed a glowing ruby from the lap of an idol and read the inscription (which mystically appeared to his mind to be in English): "Whosoever touches this gem shall possess the power of the Crimson Bands of Cyttorak. Henceforth, you who read these words shall become forevermore a human juggernaut." As Xavier watched, the gem's mystical power transformed Marko into a larger, superhuman being. Just then enemy high explosive bombardment caused a cave-in, and Marko was buried under several thousand tons of rock. Xavier survived and returned to his unit.


Marko, now the Juggernaut, eventually dug himself free with his newfound power and made his way to America to use his power to kill Xavier. He was defeated by Xavier and his original team of X-Men with the help of the Human Torch. Over the years the Juggernaut has clashed with Xavier and both the original and new teams of X-Men repeatedly. He has also formed a successful criminal partnership with his old friend Black Tom Cassidy.

Also in intervening years he had clashed several times with Spider-Man, The Hulk (as Merged Hulk and the Horseman War), Spider-Woman and the Avengers.


The sentient psionic being known as Onslaught, actually an amalgamation of the psyches of Xavier and Magneto, would-be world conqueror and mutant Master of Magnetism, ripped the Crimson Gem of Cyttorak from Juggernaut's body and imprisoned him within. Inside the jewel, Cain learned he was an avatar for Cyttorak. As such, the otherworldly entity sought to assume control of Juggernaut's form. But Cain, through sheer force of will, destroyed the evil god and returned to Earth, stronger than ever, but unable to fully control his amplified abilities.

Cyttorak & Heroism

Cyttorak was merely one of a pantheon of eight gods, all with earthbound avatars. These Exemplars enlisted the Juggernaut's aid in constructing a machine that would enslave the human race. As the Exemplars tended to in their final preparations, Cain withdrew deep into himself, where he clashed with Cyttorak. Charles entered his stepbrother's mind to aid him in the battle, but the Exemplar known as Bedlam sensed his presence and expelled him. Still, Charles' short stay in Juggernaut's head had helped Cain regain control of his psyche. After defeating Cyttorak, Juggernaut destroyed the Exemplars' God Machine. He then turned his attention to the avatars themselves, defeating each in turn.

Juggernaut again was cast as a hero when the sentient spaceship Prosh escaped the confines of a Celestial prison, returned to Earth and dispatched a group of disparate beings on a journey through time to uncover the keys to preserving human evolution. Besides Cain, Prosh's task force included Phoenix and Iceman, members of the X-Men; and Mystique and Toad, mutant terrorists. Their mission: Save the human race from a threat that might not manifest itself for millions of years. Juggernaut was shown that for all his physical strength, he long has lacked strength of character. Despite all his yearning for power, he has squandered his supernaturally enhanced abilities. When Prosh reassembled the members of his team in the present, they fought and defeated the enigmatic alien entity known as the Stranger, who sought to control the natural evolution of humans and mutants. If not acquiring a newfound respect for life and human dignity, at least Juggernaut gained a better sense of understanding for the mutant plight.

As the result of an undisclosed battle with Cyttorak, his patron deity, Cain lost most of the power of the Juggernaut. Thereafter, Cain reconciled with Xavier and joined the X-Men. In an unusual turn for someone of Cain's personality he immediately befriended several people at the mansion including a young mutant boy named Sammy Pare, a.k.a. Squidboy, who had a positive influence on him. Cain later allowed himself to be taken into custody and then had a one-night stand with She-Hulk, who as Jennifer Walters was representing him in his trial for all the crimes he had committed as a criminal. It would turn out later that it was, in fact, an ‘Earth One’ alternate of Ms Walters. Amazingly, Cain was exonerated of all his crimes and allowed to go free despite having numerous outstanding felonies both at home and abroad.

Later, Black Tom Cassidy resurfaced and Juggernaut joined his new Brotherhood of Mutants, with the intention of betraying the group and warning the X-Men when he had the chance. Squidboy stumbled upon the Brotherhood having a meeting, and thinking that Juggernaut had betrayed the X-Men he became angry and started yelling. Annoyed, Black Tom killed the boy. Furious with rage, Juggernaut tried to kill his former friend. When the Brotherhood were sucked into a black hole by the second Xorn, Juggernaut accompanied them to make sure Nocturne (another mole) would be safe if everyone survived and to make sure the Brotherhood didn't try to attack the mansion again.


He ended up in Mojoworld and became the property of Mojo along with Nocturne. To escape, Nocturne took control of Mojo's henchwoman, Spiral, and opened a portal to the X-Men's Danger Room, where they were reunited with the team. This, however, was a trap set by Spiral, who was in more control of her body than thought, leaving a portal open to allow Mojo to cross over as well. Mojo turned the X-Men into X-Babies, but they managed to overpower his forces anyway. Juggernaut still felt extremely guilty about Squidboy's death, and how the boy's last words were that he hated him. He wondered if he should remain a child, this being his chance to start over with a clean slate, but Storm comforted him and convinced him not to. The X-Men were re-aged, and Juggernaut remained with the team.

World War Hulk

Cain was among the various teams of X-Men attempting to protect Professor Xavier from the wrath of the Incredible Hulk. Though Cain had recently come into possession of the gem of Cyttorak, he was still unable to call forth his full power during his first battle with the Hulk and was quickly defeated. Cyttorak himself appeared before Cain and explained that Cain himself was the cause of his own weakness. Cyttorak intended for Cain to use the powers granted to him to fulfill his own selfish desires and needs and not for heroic purposes. Cain finally accepted his role as Cyttorak's avatar to it's fullest extent and regained his full power. He challenged the Hulk once more and the Hulk was unable to defeat him this time, battling him to a standstill for the time being. As Cain continued to push the Hulk back, the Hulk used his cunning to use Cain's own momentum and near-unstoppable movement against him, which briefly removed him from the field of battle long enough for the Hulk to escape.

A Battle Between Brothers

Juggernaut held a bar hostage waiting for Charles Xavier to meet him. After a brief discussion on the origin of the word "Juggernaut" and Cain killing a bar patron at random. Cain tells Charles that he is going to kill him. So he gives Cain a box that is to be opened after his death. After Cain kills his Step-Brother he goes on with his life as he always has. Robbing banks, fighting the X-Men etc. Until he decides to open the box. And sees himself lying in bed sleeping. It was all an illusion. Xavier was in his head the entire time. He did this for the simple fact that he knew Cain would kill him if he appeared in person. After the encounter, Xavier acknowledges that redemption is not possible for Cain.

An encounter with Skaar

When Banner wanted Skaar to train for the battle with Hulk, he used a satellite in order to destroy Juggernaut's home in Arizona. That made Juggernaut angry so he tracked Banner and Skaar immediately. When they met each other, Banner explained why did he do that, but Skaar didn't want to fight Cain, so he left Banner for him to play with. Juggernaut punched Banner so hard that he caused giant earthquakes nearby, and despite of the fact Banner had his shield up, he still felt the pain of those tremendous blows. Then Skaar interrupted their fight and the battle between him and Juggernaut began. Skaar made one successful hit, but the rest of the battle was definitely not in his favor. Juggernaut rained his powerful blows one after another, until Skaar was brutally knocked down. Skaar reverted back to his child form, while that temporarily stopped Juggernaut from landing hits on him, presumably because Skaar was begging Juggernaut and asked not to hit him again. Distracted by Banner, Juggernaut didn't notice that Skaar ran and lifted Juggernaut high in the air by using his Old Power. They continued to battle in the sky, until they landed into the large chasm with lava flowing deep in the bottom. Skaar made Juggernaut think that they're on the same side, as both of them hated Banner. They teamed up and were flying on the giant rock out of the chasm, but in the end Skaar tricked Juggernaut again and pushed him from behind, so Juggernaut fell from the rock and while he was landing, Skaar used Old Power to send Juggernaut to the orbit, removing him from the battlefield.

Captain Universe and Juggernaut

Recently, Juggernaut was shown to have a serious encounter with new Captain Universe and he also met his old foe, Spider-man, again. After landing into the one of Manhattan's parks, he was found by Spider-man and then by police,who delivered him into the inwood armory in the Upper Manhattan. Spider-man found Juggernaut and asked him who did it to him. Juggernaut described the appearance of the attacker, when suddenly the one they were talking about appeared - Captain Universe, with host being unknown. He attacked Spider-man and then threw the platform with Juggernaut into the Jersey Palisades. While Spider-man took care of Captain Universe, Juggernaut woke up and took out two policemen nearby. Noticing that his helmet was destroyed, he created another by using the Crimson Magic. He found Spider-man binded, and despite Spider-man's worst expectations, he didn't kill him but freed him. Suddenly, Captain Universe appears again, wanting the revenge on the Juggernaut. However, this time he was not so lucky as Juggernaut quickly handled him and was about to land a finishing blow. Spider-man said Juggernaut not kill Captain Universe, but the latter took advantage of Cain's distraction and teleported them both to an unearthy realm. There he reveals his story and true identity to Juggernaut. In fact, the host was an office worker, William Nguyen, whose life was ruined when Spider-man and Juggernaut busted through the building where he worked. William was chosen by Enigma Force in order to collect all wrongs in the world, so he decided to start with Juggernaut. He knew that once the Juggernaut starts moving, he cannot be stopped , so he decided to take Juggernaut by surprise, grabbing him from behind and flying with him in the orbit. He tried to use a mental assault on Juggernaut, but his helmet was an impediment. So William blew it up and threw him back to Earth. After telling this story, Juggernaut wanted to fight Captain Universe again, now in a fair fight. William teleported them back to Earth. While his original purpose was to repair tectonic plates that were damaged by Juggernaut, he decided to kill Juggernaut first, leading to the disappointment of Enigma Force. The repair must have been done, and for that Captain Universe is needed. Absolutely surprisingly, Juggernaut became the new Captain Universe. Enigma Force chose him to repair the damage he did long time ago. After fulfilling his purpose, Enigma Force left the Juggernaut and disappeared. So did the Juggernaut, after apologising Nguyen for that accident.

Thunderbolts and Kuurth

Cain was eventually incarcerated and was later recrutied to be part of the Thunderbolts program. With his powers limited by Cyttorak, he was unable to escape the Thunderbolts nanite control system. Cain participated in many missions for the Thunderbolts but his fears of being taken off the team and being returned to jail constantly strained his relationship with Thunderbolts team leader Luke Cage. After one mission, Luke Cage gets angry with Cain and grounds him, suggesting that he's taking him off the team completely.

When the Serpent, the true All-Father of Asgard launches his invasion of Earth, he sends out several hammers. One of the hammers hits the Raft where Cain was incarcerated, and due to his anger with Luke Cage, Cain picks up the hammer which transforms him into Kuurth Breaker of Stone. Cain is placed entirely under the control of the Serpent and he is sent to San Fransisco in order to turn the mutants and humans against each other. The X-Men throw everything they have at Kuurth but are unable to stop him, prompting Magik to take Colossus and Kitty Pryde to bargain with Cyttorak.

Magik tells Cyttorak that Cain now serves another god (the Serpent) which prompts Cyttorak to dismiss Cain as his avatar. Magik initially offers up herself as his replacement but her brother Colossus interjects and becomes the new Juggernaut. He manages to drive Kuurth out of San Fransisco and after the defeat of the Serpent, the now powerless Cain is returned to the Raft.

Cain is later brought out of his incarceration by US-Agent who has received word from Cain's fellow Thunderbolt Ghost that Cain is vital in averting an apocalyptic future. Man-Thing uses his dimensional abilities to connect Cain to an alternate reality Cyttorak who was without an Avatar, who granted Cain his Juggernaut abilities once again. The blessing was temporary however, and after he had aided the Thunderbolts, they wore off. Man-Thing offered to transport Cain and the other Thunderbolts anywhere they desired, and Cain wished for lots of open space. 

Powers and Abilities

Juggernaut is an avatar for the deity known as Cyttorak. Juggernaut gains various superhuman powers while acting as an avatar, as described below.


Superhuman Strength: The Juggernaut possesses vast superhuman strength, the limits of which are unknown. He was able to go toe-to-toe against an enraged World War Hulk until the moment Cain was outsmarted and removed from the field of battle.

Superhuman Stamina: The mystical energies of Cyttorak that empower his musculature generate no fatigue toxins during physical activity, granting him limitless superhuman stamina in all physical activities.

Invulnerability: Cain is virtually impregnable to all forms of conventional physical injury, regardless of their magnitude or intensity. Although Cain is able to be harmed by exceedingly-high levels of mental or mystical attacks, these attacks have rarely been shown to cause any permanent damage.

Regenerative Healing Factor: Despite his extreme resistance to physical damage, Cain can be damaged by sufficiently powerful forces, such as mystical forces. If damaged, Cain possesses an accelerated healing factor that enables him to nearly instantaneously regenerate any damaged or destroyed bodily tissues. For instance, he has been injured by Shatterstar's sword, which was forged from a mixture of extra dimensional technology and magic and healed instantly. The demon being D'Spayre once flayed the Juggernaut down to a skeleton only after absorbing almost all of the Juggernaut's power and even then, the Juggernaut could not be stopped and was able to instantly regenerate all the damage done once he regained his full power. The only other time the Juggernaut has been physically injured is by the likes of Thor in a physical battle, and that was only after Thor used Mjolnir to negate his mystical enchantment.

Immortality: Cain is functionally immortal. His aging process is completely halted and he is immune to the effects of all toxins, poisons and diseases. He is sustained by the mystical energies flowing through his body at all times and has no need to eat, drink or even breathe to survive.

Force Field: The Juggernaut is capable of generating a personal force field around himself, extending to about 1 foot in diameter. He uses this force field to heighten his already-impressive resistance to injury. In his earliest appearances, he is able to use this force-generating ability to hurl people and objects near him away from him, though now it seems to function only defensively.

Rampant Charge: Once he begins to advance in a certain direction, it is virtually impossible to halt his movement. Some obstacles, such as many tons of rocks and plasma-discharge cannons, have slowed his pace, but can't stop him. The only known examples of him being stopped involve physical force with mystical involvement, which is Juggernaut's sole weakness. Thor unleashing his power was able to stop him in his tracks, but his powers are mystical in origin (it should be noted that Thor was severely hampered at the time as he was extremely weakened by an extra dimensional malady) and during a battle with War (Hulk), in which the mutant Apocalypse increased the Hulk's strength and power enormously by grafting Celestial tech to him, which again involved mysticism.


Juggernaut is able to summon and remove his mystical armor at will. As a result of his days in the military and his experience as a superhuman criminal and hero, the Juggernaut is a brutal hand-to-hand combatant, preferring to use street fighting and brawling techniques that allow him to make full use of his great strength.

Strength Level

Class 100+ ; The Juggernaut possesses vast physical strength which exact limit is unknown but he is able to lift far in excess of 100 tons effortlessly. He is one of the strongest beings to ever walk the Earth.


Cain is susceptible to exceedingly-high levels of mental and mystical attacks. Both have been shown to be able to at least temporarily defeat him, but neither have been shown to cause any type of permanent injury, such as death.


The Juggernaut wears a helmet fashioned from an unknown mystical metal found in the Crimson Cosmos dimension of Cyttorak. The Juggernaut subsequently fashioned a skullcap from scraps of the metal used to construct the helmet. The Juggernaut originally wore a suit of armor that he could summon around himself at will from the Crimson Cosmos. After being stripped of his powers, the Juggernaut took to wearing a suit of armor that resembled his original but was fashioned from unstable molecules. However, now that he has access to his full powers once more, he is able to summon forth his mystical helmet and armor.



Juggernaut in X-Men: Evolution

Diamond Select Juggernaut Figure

A Diamond Selects Juggernaut Action Figure

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