Greg Fox was a Smallville boy who mutated into a raptor-like creature.
Raptor[]
Greg Fox was notorious for lighting firecrackers in mailboxes, but was not hostile until his dad was fired by Lex Luthor (after Greg's father attacked a foreman on a dig site owned by Lex). Greg responded by throwing a firework into the dig, not realizing that it was full of blasting caps. Greg was almost killed, but was saved by Clark Kent, and ended up at the Smallville Medical Center.
Lex did not press charges, feeling sorry for Greg (having an angry father and no mother). Greg's father, on the other hand, was not so kind and beat Greg for his behavior. During the explosion, Greg had became meteor infected, and soon found himself starting to mutate into a dinosaur/raptor-like creature. Greg killed his father.
A few days later, Greg attacked (and attemped to eat) Lana Lang at the Talon, but Clark saved her. Greg fled the scene, and headed to the LexCorp plant, now going after Lex. He killed two guards and confronted Lex, who offered to help when Greg asked to be made normal. However, Greg mutated further and knocked Lex out. Clark arrived and told Greg that there was gas all over, attempting to get Greg to come with him. However, Greg did not want to. Greg then sparked an explosion that vaporized him, while Clark got himself and Lex out.