Jack of Hearts

Jack Hart was born in New Haven, Connecticut. Philip Hart, a scientist who created an energy source called "zero fluid", and Marie, an alien humanoid woman of the Contraxian race. After being exposed to a vat of zero fluid, Jack underwent a mutagenic change and gained the ability to project concussive energy from his body. He used his new powers to fight for good and became a superhero caled Jack of Hearts. He was later accepted on both the Avengers and the Defenders.