Skrill

The Skrill is a dragon appearing in the film adaption of How to Train Your Dragon. It is seen in the Dragon Manual while Hiccup looks for more information on Night Furies. The Skrill was also seen in the Dreamworks Dragons: Riders of Berk series premiere commercial.

Description
This elusive dragon has large wings, a spiked back and tail, and a large mouth. The spikes on the Skrill's back and tail are sharp enough to cut with the slightest abrasion, and it is an excellent flyer. It apparently resembles a Night Fury in flight and rivals its speed, being slightly slower. Like the Monstrous Nightmare, its locomotion on land resembles that of a pterosaur, using the large claws on its wings to walk and run on land.

As with most of the dragons in the manual, it is listed as being "extremely dangerous" and the manual instructs readers to "kill on sight". It slightly resembles a Thunder Drum, and its head also resembles to that of a Deadly Nadder.

In the Book of Dragons
The Skrill is featured in Book of Dragons. It is said to be highly secretive and is known to ride lightning bolts like air torpedos to reach supersonic speeds, and usually only comes out during electrical storms. It can shoot jets of white fire, and its entire body crackles with static electricity. Just being close to a Skrill is enough to make one's hair stand on end.

In Riders of Berk
So far, the Skrill has yet to appear in the series, although it is featured in the commercials.- The Skrill has yet to appear in Wild Skies, but will possibly be featured in a later episode, and will probably be added to the game after its official appearance.