Alistair Smythe is an enemy of Spider-Man.His father was a scientist who was hired by the Kingpin in order to create a set of giant robot spiders called the Spider-Slayers to kill Spider-Man. When Spider-Man defeated the Spider-Slyers, Alistair's father was trapped inside a building, and the building exploded. From that day forward, he decided to dedicate his life to kill Spider-Man, who he sees as responsible for his father's death.He modified and perfected his father Spider-Slayers. He went as far as transferring his mind into a robot body, turning himself into the ultimate Spider-Slayer.