Shivertooth

The Shivertooth is a Sharp Class dragon introduced in Dragons: Rise of Berk, and it also appears in School of Dragons.

Official Description
"This mischievous sharp class prankster is a real cut-up that leaves its opponents in stitches! Nothing can keep a Shivertooth from cutting through the heart of battle with its sharp scales!"

- Dragons: Rise of Berk

Egg
In School of Dragons, the Shivertooth egg is crystal blue and has tints of darker blue near the base and white at the tip. It resembles a snowy mountain; its pointy tip is white, and there are white patterns that run down the tip that look like snowflakes or frost. In Dragons: Rise of Berk, the Shivertooth egg is triangular. There are ice spikes on it, similar to that of a Groncicle, but the spikes all point upwards.

Adult to Hatchling
The Shivertooth has a pelican-like mouth, and it appears to be a large-sized dragon species. It has gem-like spikes lining its back, thin and sharp claws, and arrow-shaped tail tip. When walking on all fours, it resembles an alligator's posture of its legs. In School of Dragons, its appearance differs greatly, having more of the stance, size, and appearance of a theropod dinosaur. The School of Dragons version is bipedal, has a longer neck, has a curved spine, and possesses spikes on the cheeks and three arrowheads on its tail.

Titan Wing
A Titan Wing Shivertooth has a shiny grayish-blue body with sharp scales. It has spikes all over its body, especially its tail and back.

Sharp Features
The Shivertooth is said to have the sharpest claws of any dragon. They are described as being able to slice Vikings and leave them in stitches. This is a useful attack or defense strategy. They are also said to have sharp scales, very sharp spines lining down their back, and a sharp-edged arrowhead-shaped tail-end.

Frost Firepower
Similar to the Bewilderbeast, Woolly Howl, Snow Wraith, and Windgnasher, the Shivertooth shoots ice at its opponents.

Speed
According to School of Dragons, the Shivertooth is the fastest Sharp Class dragon, with a speed similar to a Snow Wraith's.

Intelligence
The Shivertooth is described as cunning and having quick, sharp wits. It is said to use its smarts against both friend (in pranks) and foe (in combat).

Behavior and Personality
As the description states, the Shivertooth is one of the most mischievous dragons, and it likes to play pranks and tricks, possibly to distract its prey or opponents before it attacks.

Dragons: Rise of Berk
The Shivertooth made its debut in Dragons: Rise of Berk, where it was available in the location introduced in the second film, Itchy Armpit. An exclusive individual, the Quiverpain, also became available.

School of Dragons
The Shivertooth then appeared in School of Dragons, but it is larger, bipedal, and has a thicker body and longer neck. It's tail design also differs in its arrowhead pattern.