Thunder is a slender, male Night Light who bears a strong resemblance to his anc

Thunder is a slender, male Night Light who bears a strong resemblance to his ancestor Toothless, having the stature and black scales of a Night Fury as well as the pure white scales of a Light Fury Surrounding his mouth, a thin streak going up his face and running from his lower jaw to the tip of his tail and on his feet. He has a series of large triangular spines lining down his back to his tail. He also has piercing blue eyes, similar to the Light Fury he is descended from. However, unlike Night Furies, Light Furies and original Night Lights, Thunder doesn't possess a dual tailfin. Instead, he possesses a three-pronged "tail spade" in the shape of "Poseidon's Trident", with an additional fin between the main two that can be tucked in when not in use. He also has toe pads on his feet like cats and dogs, and a deep chest like some dogs; which are other features that neither Night Furies, Light Furies nor the original Night Lights were known to possess. His wings and the first pair of fins on his tail are narrower than that of a Night Fury. His scales are as mostly smooth like his mother's, but he has inherited his father's rougher, more defined scales on his forelegs.