Alleged grandson of the original All-American Kid.
Jeremy Karne, just a teenager, was a murderer and sociopath who had gone by the name Kid Karnevil. He was on a team called The Pentacle, an evil counterpart to the Shadowpact. He claims that he once died and was sent to Hell for his sins but was kicked out and brought back to life because he scared the demons. When The Pentacle fought against the Shadowpact, Jeremy captured Detective Chimp and tied him to a post, where he prepared to torture and kill him. However, Detective Chimp broke free and subdued Jeremy, leaving him tied to the post. Later, Jeremy and the rest of his team were transported to the Black Tower, a prison in another dimension. Jeremy later escaped the dimension through a portal bringing in goods from Earth after he beat his guard and boasted that he had been quietly planning it for months.
Jeremy was then sent to Salvation where he met the Joker and told him that he was his role model and would try to outdo him by being more like Joker than he was himself, but Jeremy planned to do this by killing him one day. Joker felt with almost no concern as he said, "Many have tried. None have succeeded." Later, as they were escaping Salvation, Joker slapped Jeremy across his face saying, "Nobody likes a copycat!"
Infiltrating the Justice Society
Jeremy disguised as All-American Kid.Jeremy then took the alias Billy Armstrong, the All-American Kid, and lied to the Justice Society of America, saying that his ancestor, William Armstrong, was the first All-American Kid and was a sidekick to Tex Thompson. "Billy" was then placed as Mr. America's sidekick.
Jeremy soon pretended he was under mind control and pretended to resist as he took a knife and stabbed Mr. Terrific in the back. When the JSA interrogated him, he lied, saying he didn't remember anything. He got them to turn their accusations toward King Chimera as he made up questions about King's power and as soon as they heard Jeremy pretending to resist on their security tape, unbeknownst to them.
When the Brownstone was put under attack by numerous villains, Jeremy grabbed Obsidian, who had degenerated into a blackened egg. A woman in a dark, shadowy form, later named Shadow of War, appeared and Jeremy gave her Obsidian, as part of his mission. Shadow of War left and an alive Mr. Terrific appeared and told him that he knew who he really was. Jeremy revealed that he stabbed Terrific because he knew he would figure out his true identity. Jeremy also revealed that days ago he set off an illumination device that transformed Obsidian into an egg. Jeremy prepared to kill Terrific, but Mr. Terrific's T-Spheres attacked him first, knocking him out.
The Fourth ReichAfter the JSA split into two teams, the JSA kept Jeremy in custody. When they planned to hand him over to the authorities, Jeremy's team, a Nazi organization called The Fourth Reich, instantly attacked the JSA. It was revealed that The Fourth Reich wanted Obsidian to use him as the power source for their Darkness Engine, a machine that negated all super powers, which they activated during the attack on the JSA.
A time jump then took place, revealing that twenty years into the future the Meta-population had decimated and the survivors, one of them being Mr. Terrific, were held in concentration camps. Jeremy, as an adult, was the Führer of The Fourth Reich. As part of Mr. Terrific's plan, he and the other former heroes struck out a war against the Nazis, in order for Mr. Terrific to get to the Darkness Engine and shut it down. However, when he made his way to the Darkness Engine, he decided to make a call to his past self and intervene The Fourth Reich's plan from the beginning.
When he made the call, it was just before he was about to be pronounced dead when Jeremy stabbed him. The injured Mr. Terrific blurted out how to hatch Obsidian, who was still in his egg form. When Green Lantern hatched him, a time jump forwarded to when the Brownstone was attacked and when Jeremy was looking for Obsidian, thinking he was still in his egg form. Obsidian appeared, in full form, and knocked Jeremy out. Obsidian later revealed that Jeremy and the rest of The Fourth Reich were put into prison, awaiting trial.