 Nikabrik , with the aid of a hag and a werewolf , offers Caspian his help to guarantee victory . The hag uses black sorcery to summon Jadis , the White Witch . From inside a wall of ice , the White Witch tries convincing Caspian to free her , when Peter , Edmund , Lucy and Trumpkin arrive . Peter kills the hag , Edmund kills the werewolf , and Trumpkin stabs Nikabrik when he attacks Lucy . Peter knocks Caspian aside to face the Witch himself , but begins to be entranced , until Edmund shatters the ice , destroying the Witch 's apparition . 
