Whispering Death

''"The Whispering Death knows only one thing: Killing." - Bork the Bold, How to Train Your Dragon exclusive short, Book of Dragons.''

The Whispering Death is a dragon that appears in the film continuity and the exclusive short, Book of Dragons. This dragon is seen when Hiccup reads the Dragon Manual, and they are classified as a Boulder Class dragon.

Appearance
The Whispering Death is similar in appearence to a Deadly Nadder but with a longer neck, spiky face, and spirals of teeth around the entire inside of their mouth. It has a snake like body and a neck like a Zippleback's, but by contrast, a Whispering Death has no legs, only lower spikes (which might have been used to crawl through their tunnels). Many consider them to be extremely vicious and are often given nightmares after confronting this horror. They have gaping mouths full of deadly rotating teeth and they can also rotate their wings. They look very similar to the gulper eel.

Nature
Whispering Deaths are extremely deadly, like most other dragons, able to chew their victims after they are swallowed due to the many rows of rotating teeth. They tend to dwell in underground tunnels that they burrow themselves, often resurfacing to attack any oncoming enemy/prey. Whispering Deaths are also able to breathe rings of fire. The Dragon Manual states that they are extremely dangerous and must be killed on sight. But despite all of this, they love to have their teeth brushed.