Legend has it that an ancient dragon – a giant Seadragonus Giganticus Maximus – will rise from the ocean one day and end the world- and this is known as Ragnorok.<br><br>And as Berk experiences minor earthquakes and earthquakes – which are disturbing the dragons’ behavior – Stoick orders all sea traffic to remain at anchor.<br><br>Hiccup, meanwhile, is trying to train a Changewing for tactical purposes. But every time he makes progress it responds by hypnotizing him with its mesmeric gaze (as it does its prey) – with comedic results.<br><br>Meanwhile, Alvin the Treacherous plans to take advantage of the earthquakes and attack Berk…<br>However, something huge from the sea destroys his ships.<br><br>And then the Seadragonus Giganticus Maximus approaches Berk and it is seemingly unstoppable! Even Alvin tries to help the citizens of Berk.<br><br>Hiccup thinks quickly and uses the Changewing to hypnotise the SGM and it is defeated!