The Polar-Serpent is white with faint grey markings and is about the size of a panther. Their most notable physical trait is the long narwhal-like tusk sprouting from the end of their muzzle.
They have excellent sight, hearing, and sense of smell. This frosty dragon has a large harpoon-like horn that it uses to impale its prey.
They shoot thunderbolts of flame from their mouths.
Like seals, Polar Serpents like basking on icebergs, but unlike seals, Polar Serpents have a carnivorous streak. These pack dragons sit upon these icebergs like statues scanning their environment and, when one spots prey, they all dive in for a bite. They windsurf across the ice on their bellies using their wings and legs to steer and pick up speed, getting quite fast. They eat polar bears, seals, penguins, fish, and even people. Polar Serpents also use their horn for hunting: they saw holes in the ice with it and wait for their surprised prey to fall into their open jaws below.
Polar Serpents appear in this book as Hiccup is kidnapped aboard The American Dream 2 which is sailing through the Arctic on its way to the 'mythical' land of America. He is chased by the Serpents and accidentally awakens a Leviathorgan.
Polar Serpents are mentioned in this Reference Book and appear in the Dragon Key at the back of the book.
- Polar-Serpents in the Hero's Guide to Deadly Dragons on the Official How to Train Your Dragon Books Website.
NOTE: As of Spring 2018, the official website has been redesigned and key information is no longer available.