Jonathan Hart (Earth-616)

Jack of Hearts

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Jonathan Hart [ 1 ]

Current Alias

Jack of Hearts

Affiliation and Relationships


S.H.I.E.L.D., Defenders for a Day

Formerly Avengers


Phillip Hart (father, deceased);

Marie Hart (mother, deceased)

Marital Status


Physical Characteristics[32]




5′11″ ( 1.8 molarity )


175 lbs (79.38 kg) (without armor)



  • Blue (right eye)
  • No Visible (left eye)



Unusual Features

[ citation needed ]

Left half of body turned purplish-black from direct exposure to Zero Fluid.

Origin and Living Status


Contraxian / human hybrid mutated by Zero Fluid

Living Status

Alive ; once deceased



Place of Birth

New Haven, Connecticut

Cause of Death

[ 2 ] ( returned through mysterious ways ) [ 3 ]

Exploded in space(returned through mysterious ways)

Personal Information




American, Contraxian




[ 1 ]

Bachelor of english, majoring in poetry

Base of Operations

Formerly Avengers Mansion

Creators and Appearances


Bill Mantlo, Keith Giffen


Deadly Hands of Kung Fu # 22
( February, 1976 )
Quote1.png  Jack of Hearts, the novitiate super-hero — is still around ! Quote2.png

Jack of Hearts[src]


early biography

Jack Hart was the son of Phillip Hart, a brainy scientist who developed a revolutionary, extremely efficient liquid fuel called “ Zero Fluid ”, and a android alien charwoman of the Contraxian race. The foreigner was one of many scientists dispatched to try to discover an energy source to resuscitate the dwindling nuclear processes of the Contraxian sunlight. Learning of Hart ‘s experiments, the stranger assumed a wholly human form to keep Hart under surveillance. Hart and the stranger finally met, married, and produced a son they named Jack. The stranger charwoman, “ Marie, ” died in a car accident when the boy was a child. Jack grew up without know of his mother ‘s origins. [ 4 ] When Jack was a adolescent, Phillip Hart perfected his “ Zero Fluid ” and decided to donate the fuel to all the free countries of the earth. Hart was then contacted by agents of the condemnable corporation who wanted to market the Zero Fluid. Refusing to deal with them, Phillip Hart was murdered by Corporation agents before the eyes of his son. [ 5 ] Managing to escape, Jack Hart took refuge in his forefather ‘s basement testing ground Corporation agents broke in minutes by and by, and their laser-cannon sheared through the lab door, striking the tub of Zero Fluid. Doused by the herculean, corrosive fuel, Hart underwent a mutagenic change and began to glow. With an irrepressible fusillade of energy generated by his stallion body, Hart killed his father ‘s murderers. Vowing vengeance on the entire corporation, Hart fashioned a costume for himself, plundering his church father ‘s collection of armament. [ 6 ] The armor somehow interacted with the final examination stagecoach of mutation and provided a moderator that contained and controlled the spill of his body ‘s energy. [ 7 ]

Jack of Hearts

Calling himself Jack of Hearts as a tribute to his forefather ‘s passion for playing cards, he embarked on a mission of vengeance. initially his quest for vengeance on the Corporation was blind and intolerant, leading him into conflict with such innocents as the Hulk and White Tiger, whom he believed responsible for his don ‘s murder, [ 8 ] although they teamed up to take vengeance on the Corporation, receiving aid from Iron Fist and Shang-Chi during the final struggle. [ 9 ] late he aided Iron Man in freeing Stark International from coup d’etat by Mordecai Midas, and was taken under Iron Man ‘s care for a abbreviated time. [ 10 ] When his energy powers began to increase uncontrollably, he placed himself into S.H.I.E.L.D. hands. Chaffing in isolation, Jack finally broke S.H.I.E.L.D. quarantine to meet a former schoolmate of his, Marcy Kane, who was besides actually a Contraxian. She revealed to him his mother ‘s extraterrestrial beginning and convinced him to accompany her second to Contraxia to try to save their sun. [ 4 ] On Contraxia, a cult calling themselves the Survivalists captured Jack of Hearts to force him to do what he was intending to do anyhow. He was flown in a starship to Contraxia ‘s sun and there vaporized the craft before sending the energies of his body into the sunlight. In some as yet unknown manner, he obviously restored the huge quantities of hydrogen necessary to sustain the nuclear reactions of the sun, and added an undisclosed number of years to the sunday ‘s life sentence. then, still radiating great department of energy, he returned to Contraxia, his huge heat melting the polar icecaps, in club to say farewell to his girlfriend and to lecture the Contraxians about morality. He then flew off into forbidden quad, realizing that he could nobelium longer live among organic beings with his huge energies emanating out of control. [ 11 ]

Captured by the foreign

Under undisclosed circumstances, Jack of Hearts was captured by the enigmatic alien, the Stranger, and placed on his satellite for sketch. Jack of Hearts was unwittingly freed by the Avenger Quasar, who had traveled to the Stranger ‘s global for his own purposes. Joining other refugees of Earth, Jack of Hearts returned to their native planet, only to be duped by another refugee, the Presence, into fighting Quasar. His armor was breached in the fight, and Jack appeared to have exploded in a burst of Zero department of energy. [ 12 ] actually, Jack was rescued and healed by the Moondragon, in her wish to gain an ally to prove herself as a worthy choir for Quasar. Jack proved fanatic as a mentally-influenced agent of Moondragon, who soon abandoned her designs on Quasar anyhow, and Jack was released from her restraint. [ 13 ] Jack sequestered himself in the abandoned Hart mansion, but found his condition quickly deteriorating, as his energies again threatened to go out of operate. Returning to outer space, Jack sought out the alien Silver Surfer for help. The Surfer led Jack to an extraterrestrial being armor-wielder, who created a new and better energy-regulating armor for him. Jack remained with Surfer for a short clock time, and both teamed up with other cosmic heroes when they encountered the mega-powerful entity known as the Tyrant. The conflict left Jack of Hearts sternly weakened, and he was nursed back to health by companion explorer Ganymede, whereupon the two became lovers. [ 14 ]

Ganymede was the last member of a sisterhood dedicated to the opposition of Tyrant. She refused to engage in physical affair, which was not an choice for the armor-bound Jack. She was besides at one degree will to abandon an hurt Jack quite than let her foe escape. Although Jack remained by Ganymede ‘s side for many months, they finally went their discriminate ways. [ 15 ] While journeying through space, Jack of Hearts happened upon agents of the cosmic beings known as the Infinites, an confrontation which left him about dead. The incidental besides alerted members of the Avengers, including Moondragon. The Avengers rescued Jack and Moondragon helped restore his armor to his original design with several sophisticate upgrades. Jack and a team of Avengers confronted the Infinites directly, convincing the beings of the danger they posed to the population. [ 16 ] Afterwards, Jack remained alongside the group to confront a astronomic confederation ‘s decree that Earth should become a penal colony for the universe ‘s known criminals, and he helped expose the alien Kree as masterminds of the diagram. Returning to Earth, he helped the Avengers round up the remaining criminals and besides helped the Avengers set up new security and analytic tactics to become a more effective team. [ 17 ]


Jack remained with the Avengers for several missions, including those against the time-traveling Kang when he about succeeded in conquering the Earth. During this time, the Avengers extended membership to Jack in gratitude for his efforts, and he promptly accepted. The Avengers besides developed a modern striving of neutro-mist that allowed Jack to exist safely outside his armor for short periods of time. [ 18 ] The neutro-mist ‘s effects did n’t last, however — finally Jack ‘s power levels became so hazardous, he needed to spend an increasing issue of hours a day in isolation in the “ Zero Room ”. This made Jack more aggressive and argumentative than ahead. [ 19 ] When the Earth ‘s Mightiest Heroes were recognized by the U.N. as a sovereign nation, Jack remained with the team. [ 20 ] One of their first missions after this historical consequence led them to South Dakota, where a cryptic red mottle started killing people in a matter of seconds upon contact. Despite some conflicts with the U.S. military, the wholly team, with the exception of the immune Jack, donned protective suits and ventured into the red cloud to solve the mystery. There, they discovered a mysterious politics lab and realized the mottle was an american bio-weapon. While investigating further, She-Hulk ‘s protective lawsuit was compromised and Jack tried to get her out of the obscure to save her life, but unintentionally absorbed her gamma radiotherapy and made her revert to her homo imprint, further complicating her site. [ 21 ] The accumulate stress made She-Hulk lose control of her powers and unleash her savage personality. [ 22 ] She injured respective Avengers and went berserker in Bone, Idaho, about destroying the solid township. With her fear and fad at an all-time high, the assemble Avengers could n’t stop her. merely the Hulk himself was able to slow She-Hulk down until Jack of Hearts used his powers to balance her da gamma levels and help her recover command over her savage side. [ 23 ] concisely after, Jack appeared to give his animation while assisting the Avengers, leaving into space then equally to not harm earth with his explosion of Zero energy. [ 2 ] erstwhile belated, Jack ‘s body was reanimated by the Scarlet Witch when she attacked the Avengers due to a mental breakdown. Jack returned to the sign of the zodiac and abruptly exploded, apparently killing Scott Lang and damaging the Mansion grounds. [ 24 ] Lang would actually survive due to the intervention of the time-travelling Young Avengers, namely his daughter Cassie, who pulled him to the future seconds before Jack exploded. [ 25 ]


Jack was by and by apparently brought back to life by Project P.E.G.A.S.U.S. using cryptic Z-Energy previously utilized to create a Zombified Squadron Supreme. At first, he was unaware of who or where he was and promptly fainted, [ 3 ] but Captain Jill Harper, one of Project Pegasus ‘ security officers, appealed to his inside hero and made him remember who he was. [ 26 ] With a new purpose to fight for, he destroyed the zombi Squadron before sharing a kiss with Jill. [ 27 ] Years by and by, She-Hulk found Jack of Hearts, when he had crashed into her apartment, before collapsing on the floor. [ 28 ] After resting, he realized he was now able to eat, drink, and sleep for the first time since his accident, [ 29 ] which meant he besides had to use the toilet and lavish for the beginning meter in a farseeing time. [ 30 ]


Power Grid[33]


Jack of Hearts possesses a issue of superhuman physical and department of energy manipulative capabilities as a by-product of cellular mutation. Zero Energy Blasts: Upon making reach with the experimental Zero Fluid, created by his father, Jack of Hearts ‘ body undergo mutation at the cellular level allowing him to project knock-down beams of concussive department of energy from his body. The energy itself is generated through unknown ways by the cells in his body and can be directed and controlled through conscious think. This energy, referred to as Zero Energy, is generated constantly by his body and is emitted in negligible amounts whenever his cells have reached the maximum total of energy they can store. He typically directs the energy consciously through his hands and is capable of creating a brawny daze brandish of nameless limits. Whenever he discharges the energy consciously, the acquit is accompanied by a pink-colored light. [ citation needed ]

  • Flight: Jack of Hearts is able to direct the blasts of his Zero Energy downward for the purposes of generating sufficient thrust to allow him to fly. However, he must keep his arms pointed beneath him while in flight and is unable to use his energy as an offensive weapon unless an opponent happens to be directly in the path of the energy while in flight. The maximum speed he can attain while flying isn’t known, but he has flew from Philadelphia to St. Louis in three minutes[31] and it is thought that he can use the Zero Energy to open hyperspace warps while in space allowing him to travel at speeds faster than light.
  • Superhuman Strength: Jack of Hearts’ entire metabolic structure, bone, and muscle tissues have been transformed and augmented due to the mutagenic effects of the Zero Fluid. His strength has been known to fluctuate dramatically with his overall power levels. At his peak, he possesses sufficient superhuman strength to lift at least 25 tons. Jack has gone toe to toe with beings with much greater strength, though that could be due to a combination of his strength coupled with his energy powers and his body’s great resistance to physical injury.[citation needed]
  • Superhuman Stamina: Jack of Hearts’ augmented musculature generates less fatigue toxins during physical activity than the musculature of a normal human. At his peak, he can physically exert himself for roughly 24 hours before the build up of these fatigue toxins in his blood begins to tire him appreciably.[citation needed]
  • Superhuman Durability: The effects of the Zero Fluid have also augmented Jack of Hearts’ bodily tissues, rendering them much more resistant to physical injury than those of a normal human. He has been known to withstand great impact forces, such as being struck by a superhumanly strong adversary, with little to no injury whereas a normal human would’ve been severely injured or killed outright. He has also demonstrated resistance to high caliber bullets, falls from great heights, and being struck by powerful energy blasts. Jack of Hearts also requires much less oxygen than a normal human and can survive unprotected within the vacuum of space for extended periods. While traveling in space has shown to have no detrimental effects on his body, he must enter an oxygen-rich atmosphere from time to time. His body is particularly augmented for the rigors of traveling at extreme velocities. Flying unprotected at high speeds, as Jack of Hearts does, would severely injure a normal human. When he has to breathe, Jack of Hearts can do so with complete ease even while traveling at speeds of hundreds or thousands of miles an hour whereas a normal human would suffocate.[citation needed]
  • Accelerated Healing Factor: In spite of his great resilience, it is possible to cause Jack of Hearts injury. If injured however, his augmented metabolism enables him to fully heal mild injuries more than twice as fast as an average healthy human. The full limits of this ability is uncertain as, for example, it isn’t known of Jack of Hearts can merely heal normal injuries or if he can fully regenerate damaged or destroyed tissue.[citation needed]

Scanalyzer Enhancement: After being exposed to a Scanalyzer powered by a Symbiot Energy Sump device, Jack of Hearts ‘ undergo another mutagenic revision that allowed his encephalic patterns to be overlaid with the Scanalyzer ‘s artificial intelligence. This enhanced his consciousness to a level here he can think at the accelerate of a computer, ampere well as retain and retrieve stored information with computer logic along with the human brain ‘s naturally bombastic storage infrastructure. [ citation needed ]


Jack is a estimable hand to pass combatant, having had some train in unarmed combat by S.H.I.E.L.D. however, Jack tends to rely on his energy blasts during combat situations. [ citation needed ]


While his body can potentially withstand the rigors of out outer space indefinitely, Jack of Hearts still requires oxygen to survive, albeit much less than a normal human. Hence, if he finds himself in a vacuum environment for besides hanker, it will prove fatal to him. [ citation needed ]



Jack of Hearts wears a suit of street fighter, boron-whisker-impregnated, steel alloy fabric, articulated body armor that covers all of his body except his face and hands. This suit of armor has somehow become absorbed by the mutagenic effects of the Zero Fluid vapors and incorporated into Jack of Hearts ‘ body. [ citation needed ]


  • Jack’s death occurred on a May 5th or at least that was the date when he was filed as inactive.[24]

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