Legion was created in a Russian based lab in Antarctica, his DNA was altered to make him more vicious and he was also given extra high dosed injections of testosterone to help exacerbate his vicious nature. The horns on his head were surgically implanted to his skull and have blood flowing through them, they are held in place on his skull with surgical screws and the wounds on his head never healed right so he must have daily antibiotics to keep infection at bay and this is the reason for the gauze that can be visibly seen at the base of his horns. Legion was intended to be used by the Russians as a secret weapon but was rescued by a US Army special forces team and handed over to a man only known as "Clint", who is specializes in dealing with high risk dangerous tokotas.