Small start and big finish
Mark Grayson is the only child to Nolan and Debbie Grayson. The three appear to live the typical suburban lifestyle but they share a very big secret: Nolan is actually the world’s most powerful superhero, Omni-Man. Just after his seventeenth birthday, Mark discovers he has inherited his father’s powers. Mark learns of his Viltrumite heritage and trains with his father to become a superhero known as…Invincible.