Flightmare

The Flightmare is a dragon that appears in Defenders of Berk. It appears in the episode "Fright of Passage".

Appearance
The Flightmare is a medium-sized dragon that has a very ghost-like appearance. Its body is covered in small spots that almost resembles the night sky.

Abilities
The Flightmare's body glows by eating algae that shines along with the Northern Lights. It can strike with a mist that paralyzes its prey to give itself enough time to return and finish it.

Defenders of Berk
The Flightmare first appeared in Fright of Passage, terrorizing Berk every ten years. Last time, Astrid's uncle, Fearless Finn Hofferson, faced the dragon and seemed to be frozen by fear, shaming her family's name. Astrid and Hiccup set out to find the Flightmare, where Astrid tried to fight it, but was frozen by the dragon's mist. They learned that victims of the dragon were not frozen by fear, but paralyzed. They soon discovered a stream of glowing algae that gives the Flightmare its glow, as well as other dragons (as discovered by Toothless). Realizing that the Flightmare only attacked Berk because it thought the Vikings were threatening its food supply, Hiccup, Astrid, and Fishlegs created a new channel for the algae to flow into the sea, and the Flightmare left Berk. Hiccup explained to the village what they learned about the dragon and that Finn Hofferson truly was fearless, restoring honor to Astrid's family.

Trivia

 * The Flightmare is the only known dragon that appers every 10 years.
 * The Flightmare may be a Strike Class dragon, based on its speed and attack. There is also the possibility that it may be a Fear Class dragon, due to it's name, or a Mystery Class due to its strange, mysterious abilities.
 * The dragons first appearance is in Episode 6 Fright of Passage.
 * the flightmare is a Fear class dragon due to fact it is seen in the dragon manual with the Hideous Zippleback and Snaptrapper. This means Flightmare is the only Fear class dragon to not have multiple heads.
 * The Flightmare is the first herbivorous dragon to be seen as it only feeds on algae.
 * The Flightmare's desgn is similar to that of the Skrill. In fact, most fans believed it to be a Skrill at first.
 * The Flightmare probably had killed Fearless Finn Hofferson, because it strikes when it's prey is paralyzed, and there was no one to rescue him.
 * ====this makes the 4th fear class dragon the other three been Hideous Zippleback and Snaptrapper and the ====