Boreal

Boreal was the Ice Emperor's loyal dragon. It was made of pure Ice and was created by the Ice Emperor sometime after he took over the Never-Realm. It was also the fearsome and dreaded ice dragon that was guarding the Castle of Ice. The Ice Emperor used it to freeze the village of the Formlings and the Great Lake. It attacked the Ninja while they went to rescue Lloyd, and was eventually destroyed by Kai who regained his power of Fire.