You're a shapeshifter that lives in Jotundalen that was known to be dead after you fell down a cliff protecting a bear cub, but in a split second you turned into a blue sea serpent thats a bit smaller than the red sea serpent that lives in Jotundalfjorden and ever since you have still tormented viking patrols, in sea as a sea serpent and on land as yourself with a mask over your nose and another mask made of a bear skull.