My redesign of Thunder from The Nine Realms aka TNR
Yup, I've made Thunder a half-Skrill. He also has gotten backstory and some dark-blue hue (In Legends of the Nine Realms, last and best HTTYD video game, there are 4 kinds of normal Skrills: basic ones, Spitters [yellow hue, spit far more lightning, weaker muscles], Protectors [weak physically healers, with blue hue] and Alphas [basically elders].)
Backstory: Thunder's mother had a love affair with some Skrill Protector, but he left her (since Skrills don't mate for life, most surely), and she somehow managed to mate with son of the King of the Hidden World, all of this before Tom's dragon hatched. Thunder lived with his family unknowing of his tempestuous ancestry, until some crazed titan wing Skrill obsessed with glorious death raided King's Realm and splitted whole family. In pursuit of returning home, he ends up a bit too close to the surface and under rocks, and is discovered and uncovered by Tom.
What do you think about it?