He takes stalking to a whole new and disturbing area. Introduced in Amazing Spider-Man #31 (1965) by Stan Lee and Steve Ditko (and later as the Jackal in Amazing Spider-Man #129 by Gerry Conway and Ross Andru, which also has the first appearance of the Punisher), Professor Miles Warren was once a student of the High Evolutionary, where he began his cloning experiments leading to create a Man-Jackal being. This Man-Jackal killed Miles’ first wife and child which lead to him losing his mind before being expelled by the High Evolutionary for his experiments. He got a job as a professor at Empire State University and became obsessed with Gwen Stacy. After her death at the hand of Green Goblin, he blamed Spider-man for her death and began to plan his warped revenge.

This began by cloning Gwen Stacy and Peter Parker, resulting in a few clones but the most famous being Kaine and Ben Reilly. He developed a Jackal persona and would try to kill Spider-man by using others in his game, including the Punisher, who he tricked into thinking Spider-man was a villain. He then sent a clone of Gwen to mess with Spider-man’s mind. During a battle with Tarantula, he revealed his identity to Spider-man and captured him. He brought the Web-head to a stadium and had him fight a clone of Spider-man. Jackal, a clone of Miles, had planted a bomb in the stadium and cause the stadium to explode, Spider-man emerged from the rubble believing that Jackal and the clone were killed.

This turned out to be Jackal’s plan. He took the clone’s body and erased his memories of the clone being sent off into the world. This clone would become Ben Reilly and would eventually meet Peter, with neither of them sure of which one of them were the clone. Jackal returned to torment Peter and Reilly, making them think that Reilly was the true Peter. He would be killed a few times but returned as an altered clone. Much later, Jackal would return and began working with the Spider-Queen to infected the island of Manhattan with a spider-virus, giving the people Spider-powers and later transforming them into Spider-monsters.

Later still, he revived Ben Reilly after he was killed by Green Goblin and began experimenting on him, killing him dozens if not hundreds of times, cloning and reviving Reilly every time with the memories of his death. Reilly eventually broke free and beat Jackal. Reilly took the identity of Jackal and began cloning many friends and enemies of Spider-man, using Warrens and his clones as his lab assistant. After Reilly was defeated in the Clone Conspiracy, Warrens learnt which one of the clones was the real Warren and took the Jackal identity again, attacking Reilly but was beaten. He took a job as a professor again, which was attended by Spider-Gwen, believing her to be the real Gwen. He travelled to her universe and tried to convince her of their love, but he was beaten back. He would later bring Spider-Gwen’s universe Mary-Jane to the prime universe and bonded her with a Carnage Symbiote.

After Green Goblin’s death, Jackal was considered Spider-man main villains for many years and was responsible for the Clone Saga, which, while dragged out more than it should have been, introduced Ben and Kaine into the Marvel Universe. Jackal would receive a figure as part of the Spider-man Sandman wave.