History
The early life and history of Jonathan Hart mirrors that of his Earth-616 counterpart.
Jack was one of many superhumans enslaved by the Skull, a would-be tyrant with the ability to completely control any living being he encountered.[1] Following the defeat of the Skull, Jack of Hearts would become a knight under the command of King Britain in the UK.[2]
There he would be one of the many soldiers who would defend Buckingham Palace from attackers, notably the Tong of Creel who attacked the castle to retrieve a portion of "Crusher" Creel which was under the King's protection. While serving his king, he encountered Princess Luna of the Inhumans, who soon became infatuated with him. The two eventually began a relationship.[2][3]
Jonathan also briefly aided other heroes in helping Mar-Vell in collecting items of power in his quest to kill Death by collecting items of power on Earth. He also attended the wedding of King Britain and Medusa and helped fight off the Deviants during their attack on the castle, secretly led by Mephisto.[4][5]