Cataclysmic monster: Raoul

Former king of hell, father of Barbatos, and the king's traitor when he was just a general, because he discovered that his king is a friend with the angels and works with them, he was very angry and decided to assassinate him. But after becoming a king for a while, he is eternally imprisoned by the angels. But for some unknown reason, he escaped. He felt very weak after a long imprisonment, but after using Dark Carbon, he decided to take vengeance.