Dragon

Dragon is a huge mythical winged reptile with the ability to breath fire. A dragon also briefly appears in Norsemen when Jarl Varg is searching for the ultimate weapon against his enemy Jarl Bjørn. In Season 3, Episode 4 : War Table Varg makes a deal with a woman, the Dragonrider (portrayed by Pia Tjelta), who is able to speak to the creature and who can command it. The Dragonrider shows some drawings of her and the dragon which quite impress Jarl Varg.

In Season 3, Episode 5: Do You Believe in Dragons? the dragon then briefly appears on Dragonrider's call near the battlefield, but Varg suddenly is overcome by suspicion if that dragon really exists. All the pleas of the Dragonrider to just turn around and to look keep unheard and she is stabbed to the death. The dragon flies away unseen by the warriors.

Trivia
Only the audience in front of the telly witnesses the dragon behind the Viking warriors.