"Peter" emerged from one of the Jackal's pods. Believing himself to be the genuine Parker, he confronted Spider-Man (Peter Parker), Ben Reilly, and Kaine. He became obsessed with proving to Mary Jane Watson that he was the real Peter and once Peter, Ben, Kaine and MJ were all near him at once the Jackal's programming kicked in and his shape shifting powers activated and he turned into a monster who was killed when Kaine threw a propane truck at him. Scrier would later resurrect him.
His actions were violent, and the Jackal revealed he had been engineered to kill the real Peter, Ben, Kaine and Mary Jane.
The Jackal further assisted "Peter" by giving him detailed info on various villains and allies of Spider-Man. Together Spidercide and the Jackal killed 2600 people in Springville, Pennsylvania by releasing an airborne version of the Carrion virus. This same incident triggered the powers of Helix. Spidercide once stole a container of ribonucleic nanocontagium from the genetic research firm Genetech which lead him to have a confront with the New Warriors.
Spidercide later betrayed Jackal to Scrier (who was eventually revealed to be an operative of a cult of Scriers working with Norman Osborn). Scrier also removed Spidercide's clone degeneration factor and the Jackal was incapable of triggering his degeneration like he had done with fellow clone Jack. He was killed when falling off the Daily Bugle after it was revealed that the Jackal had deceived him.