I Have a Chaos Prison

Poisoned to death, a young prodigy wakes as the new warden of an ancient prison holding fearsome immortals. He bargains with the inmates for powerful techniques and claims leadership of his family, only to become a target for those who covet his demonic arts. At a divine academy, he befriends a northern princess and faces a king's son in a perilous trial. Can he protect his allies while uncovering the prison's deepest secret?