A Monstrous Nightmare is Monstrous and a Nightmare to train. They come in diffrent colors 

In The Series Dreamworks Dragons Riders Of Berk or Defenders Of Berk, a Monstrous Nightmare called Hookfang  and his rider, Snotlout 

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.