King Sombra pet dragon facts

Thunderclaw

Official Description 
Members of this Tracker Class breed form running, rumbling herds very easily. Talk about safety in numbers... unless you are in their way during a stampede.
The free-spirited Thunderclaw is all business when it's time to face opponents on the field of battle. 
Development 

The Thunderclaw was created using a modular system to mix and match preset body parts onto different dragons. It was created from the same base that was used for the Shovelhelm, Snafflefang, Snifflehunch, Windgnasher, and two other unknown dragons. 

Physical Appearance 

Thunderclaw eggs are pear-shaped and are usually tan. They have a dark brown tip with wavy patterns that course down to the bottom of the egg. Occasionally, they come with leopard-like spots. 

Hatchling to Adult 

Thunderclaws have a ledge on their chin and a large sail on their back. Their bodies have large spots or stripes as patterns and they have a thick, fat tail. Thunderclaws are a squat dragon with large bodies and short, but strong legs. They are, for the most part, bipedal but can rest on their forelimbs when necessary. They have a large nose horn and an elongated chin. Their hides have colorful spotted markings of varying colors. Some Thunderclaws even sport iridescent scales, as seen during the introduction to Valka's Bewilderbeast in How to Train Your Dragon 2. 

Titan Wing Thunderclaws are yellowish green and have dark green spots on their bodies. The ledges on their snout become dark green, along with the spines along its back. The sail on their backs has grown into a sharp spike. Titan Wing Thunderclaws develop spikes under their chin and two prominent canines on their lower jaws.

Abilities     Sense of Smell 

Thunderclaws have an acute sense of smell which allows them to track and locate items easily. This ability has allowed Vikings to classify them into the Tracker Class. They prefer to use their tongues to aid them in smelling, like snakes or lizards. According to To Berk and Beyond, Thunderclaws flick their tongues out in the air like snakes to 'taste' the air and as a result, frequently have their tongues lolling out. 

Thunderclaws can shoot streams and fireballs of either green or orange flames. Whilst breathing fire, their nasal horn seems to glow slightly from the inside as they emit flame.

Strength and Combat 

Thunderclaws are strong dragons, which is shown when Sailback managed to carry Toothless all the way to Valka's Mountain, when several armored Thunderclaws were able to pull some of Drago's war machines, and when Bonesnarl carried Snotlout with the extra weight of a metal armor while running with minimal signs of struggle. Thunderclaws are also able to break through a metal roof with little to no effort. 

Weaknesses     Stress Response 
It was revealed in The Serpent's Heir that Thunderclaws don't fly when they are panicking, and tend to stampede on the ground. This could make them easy to capture, which might explain why Drago had so many in his army. According to Dragons: Titan Uprising, this reaction to stress was utilized by Dragon Hunters, who would spook large herds over cliffs for easy capture. It is unclear if all dragons harvested in this manner survived. Inhibition of Tracking Ability 

Eret in To Berk and Beyond indicates that feeding a Thunderclaw a piece of yak butter gums up their teeth and tongue, distracting them and hindering their tracking ability. 

Behavior and Personality 

This dragon usually lives on the ground, although it can fly when it needs to. They tend to live in packs, and have a Sailback sniff the newcommer.gif tendency to stampede. Staying in groups allow the dragons to have safety in numbers from larger predators. As such, they prefer open plains or tundra which allows them to gather freely in large numbers. Thunderclaws are herding animals implying a strong social nature. They appear to learn and take orders well from a group leader (or rider or captor). As a side effect of social behavior, the Thunderclaw can feed off the stress and anxiety of others in their group causing panic. They can also be temperamental at times, especially Polar Thunderclaws. Dragons: Titan Uprising also implied Thunderclaws have a wide ranging diet from Fish like monkfish, to plant material such as Sagefruit. 

Thunderclaws are relatively easy to train, as they are mostly peaceful dragons. If a person saves a Thunderclaw's life, the dragon will be forever thankful and will stay close to its savior, as it was the case with Sailback and Valka. Thunderclaws are also trained to pull sleds by the Uruz Tribe, though the exact particulars of their method has not been divulged. 

class: tracker 

diet: fish, crab, sagefruit, pie made from Queen Darkness Flower

habitat: Plio Valley, regular forest, great plains 

fire type: Green/orange fire 

Features:Sail on back
Rounded nasal horn
Rounded ledge under chin  Abilities:Tracking
Stampeding  Attack:14 Speed:16 Armor:16 Firepower:12 Shot
Limit:6  Venom:0  Jaw Strength: 

10 

Stealth:6