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驯龙高手：九大王国
Tom and the riders discover the Ice Realm and find Buzzsaw inside.
Alex and Eugene find themselves at odds with Tom and their fellow dragon riders when Feathers and Webmaster go missing during a blizzard in the Ice Realm.
Jun struggles to convince Tom to trust her faith in myths over the Book of Dragons when they venture to a place that his book seems to say is extremely dangerous.
Tom’s leadership abilities come into question by Eugene when his decisions lead to failure while attempting to confront Buzzsaw.
Tom and Thunder discover a baby Nightlight and must bring him back to Thunder’s home realm.
When Thunder’s clan of fellow Nightlights is attacked by the Snow Wraith, Tom vows to rescue them.
