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Jack of Hearts
Real Name: Jack Hart
Occupation: Adventurer
Identity: Publicly known
Legal Status: Citizen of the United States with no criminal record
Former Aliases: None
Place of Birth: New Haven, Connecticut
Marital Status: Single
Known Relatives: Philip (father, deceased), Marie (mother)
Group Affiliation: None
Base of Operations: Unknown, somewhere in outer space
First Appearance: DEADLY HANDS OF KUNG FU #22

History: Jack Hart was the son of Philip Hart, a brilliant scientist who developed a revolutionary, extremely efficient liquid fuel called "Zero Fluid," and a humanoid alien woman of the Contraxian race. The alien was one of many scientists dispatched to try to discover an energy source to resuscitate the dwindling nuclear processes of the Contraxian sun. Learning of Philip Hart's experiments, the alien assumed a totally human form to keep Hart under surveillance. Hart and the alien eventually met, married, and by as yet unknown means, produced a son they named Jack. The alien woman, "Marie," died in a car accident when the boy was a child, and neither her husband nor child ever learned of her extraterrestrial origin. (Apparently, an autopsy was not performed on her body.) When the boy was teen-aged, Philip Hart perfected his "Zero Fluid" and decided to donate the fuel to all the free countries of the world. Hart was then contacted by agents of the criminal Corporation who wanted to market the Zero Fluid. Refusing to deal with them, Philip Hart was murdered by Corporation agents before the eyes of his son.

Managing to escape, Jack Hart took refuge in his father's basement laboratory Corporation agents broke in minutes later, and their laser-cannon sheared through the laboratory door, striking the vat of Zero Fluid. Doused by the powerful, corrosive fuel, Hart underwent a mutagenic change and began to glow. With an uncontrollable burst of energy generated by his entire body, Hart killed his father's murderers. Vowing vengeance on the entire Corporation, Hart fashioned a costume for himself, plundering his father's collection of armament. Somehow the armor interacted with the final stage of mutation and provided a moderator that contained and controlled the release of his body's energy

Calling himself Jack of Hearts as a tribute to his father'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 Sons of the Tiger and the Hulk. Later he aided Iron Man in freeing Stark International from takeover by Mordecai Midas, and was taken under Iron Man's tutelage for a brief time. When his energy powers began to increase uncontrollably, he placed himself into S.H.I.E.L.D. custody. There he met a former classmate of his, Marcy Kane, who was also actually a Contraxian. She revealed to him his mother's extraterrestrial origin and convinced him to accompany her back to Contraxia to try to save their sun. On Contraxia, a cult calling themselves the Survivalists captured Jack of Hearts to force him to do what he was intending to do anyway. He was flown in a starship to Contraxia's sun and there vaporized the craft before sending the energies of his body into the sun. In some as yet unknown manner, he apparently restored the vast quantities of hydrogen necessary to sustain the nuclear reactions of the sun, and added an undisclosed number of years to the suns life. Then, still radiating great energy, he returned to Contraxia, his vast heat melting the polar icecaps, in order to say farewell to his girlfriend and to lecture the Contraxians about morality. He then flew off into outer space, realizing that he could no longer live among organic beings with his vast energies still emanating out of control.

Under unrevealed circumstances, Jack of Hearts was captured by the enigmatic alien, the Stranger, and placed on his planet for study. Jack of Hearts was inadvertently freed by the Avenger Quasar, who had traveled to the Stranger's world for his own purposes. Joining other refugees of Earth, Jack of Hearts returned to their native planet, only to be mind-controlled 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 energy. Actually, Jack was rescued and healed by the Moondragon, in her bid to gain an ally to prove herself as a worthy consort for Quasar. Jack proved overzealous as a mentally-influenced agent of Moondragon, who soon abandoned her designs on Quasar anyway, and Jack was released from her control.

Jack sequestered himself in the abandoned Hart residence, but found his condition rapidly deteriorating, as his energies again threatened to go out of control. Returning to space, Jack sought out the alien Silver Surfer for help. The Surfer led Jack to an alien armor-wielder, who created a new and better energy-regulating armor for him. Jack remained with Surfer for a short time, and both teamed up with other cosmic heroes when they encountered the mega-powerful entity known as the Tyrant. The battle left Jack of Hearts severely weakened, and he was nursed back to health by fellow adventurer Ganymede, whereupon the two became lovers.

Ganymede was the last member of a sisterhood dedicated to the opposition of Tyrant. She refused to engage in physical intimacy, which was not an option for the armor-bound Jack. She was also at one point willing to abandon an injured Jack rather than let her enemy escape. Although Jack remained by Ganymede's side for many months, they eventually went their separate ways.

Once, while journeying through space, Jack of Hearts happened upon agents of the cosmic beings known as the Infinites, an encounter which left him nearly dead. The incident also alerted members of the hero team Avengers, including Moondragon. The Avengers rescued Jack and Moondragon helped restore his armor to his original design with several sophisticated upgrades. Jack and the Avengers confronted the Infinites directly, convincing the beings of the danger they posed to the universe. Afterwards, Jack remained alongside the group to confront a galactic federation'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 plot. Returning to Earth, he helped the Avengers round up the remaining criminals and also helped the Avengers set up new security and analytical tactics to become a more effective team.

Jack remained with the Avengers for several missions, including those against the time-traveling Kang when he nearly succeeded in conquering the Earth. During this time, the Avengers extended membership to Jack in gratitude for his efforts, and he readily accepted. The Avengers also developed a new strain of neutro-mist that allowed Jack to exist safely outside his armor for short periods of time.

Height: 5 ft. 11 in.
Weight: 175 lbs (without armor)
Eyes: Blue (right), white (left)
Hair: Brown
Unusual Futures: The left half of Jack of Hearts' body has turned purplish-black from direct exposure to Zero Fluid. Jack of Hearts' left eye has an opaque white membrane covering the entire pupil.

Strength Level: Unknown, presumably superhuman.

Known Superhuman Powers: Jack of Hearts possesses the ability to project concussive energy from his body. This energy, a by-product of the cellular mutation caused by contact with the experimental Zero Fluid, is generated in some as yet unknown way by the cells of Jack's body and can be directed in controlled amounts by conscious thought. Zero energy, as it has been called, is constantly being generated by his body and is emitted in negligible quantities whenever his cells reach their saturation point. Consciously directing the flow of energy (usually through his hands), Jack of Hearts can create a shock wave, the current maximum force of which is unknown. The energy discharge is accompanied by a pink colored light phenomenon.

Jack of Hearts can direct the blasts of his Zero energy downward to generate sufficient thrust to allow him to fly, much like a liquid-fuel rocket. Because of the fact that he must keep his arms pointed beneath him during flight, he cannot use his energy as an offensive weapon, unless his opponent is directly in the path of his "exhaust."

Jack of Hearts was exposed to a Stark International supplied Scanalyzer which was powered by a Symbiote-Energy Sump device, that derived low-level energy from sources within his body. A favorable mutagenic alteration allowed Jack of Hearts encephalic patterns to be overlaid with the artificial intelligence of the Scanalyzer. This enhanced Jack of Hearts' consciousness enabling him to think at computer speeds, and retain and retrieve information with computer logic plus the human brain's large storage base.

Jack of Hearts' entire metabolism has been transformed by the Zero Fluid's mutagenic effect on him. Not only does he require less oxygen, but he is physically stronger and more resistant to injury. Jack of Hearts can easily withstand small-caliber firearms. Further, if he is injured, his rate of healing is over twice that of an average, healthy human's.

Now that Jack of Hearts' powers have increased exponentially, it is difficult to gauge what his current abilities and overall power level is.

Weapons: Jack of Hearts wears a suit of tough, boron-whisker-impregnated, steel alloy cloth, 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 by Jack of Hearts' body.

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