The Corrupted Nightmare is a feared being in his realm due to his sheer power. As a result of a failed spell, he was corrupted and perished, losing nearly all of his memories. He's extremely manipulative and narcissistic, even believing he is a god with how much power he has. The shadow steals souls to acquire even more power, being believed to have taken hundreds of thousands in the past 4000 years. He despises the royal family, especially Prince Jack, possessing him every year with the hope of taking total control. The Corrupted Nightmare has a  fairly deep, haunting voice with a British accent. A filter for echo/reverb could be used to get the ghostly effect. (Headcanon Malak from Dark Deception.)