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. He 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.
- "Wasted True Potential" (dream)
- "The Belly of the Beast" (dream)
- "Secret of the Wolf"
- "The Last of the Formlings" (flashback)
- "My Enemy, My Friend"
- "Once and for All"