Valknjöggr - A great dragon appointed by Odin to watch over Valhalla, whilst the Einherjar prepare for Ragnarok. It is believed that this creature was crafted by the bark of Yggdrasil, a fingernail from the frost giant Ymir as well as Odin’s own wisdom, Thor’s strength, and Tyr’s courage and loyalty. Once the soul of a slain hero is brought to Asgard they are judged by Valknjöggr before they are allowed passage to the great hall of the slain, Valhalla
Geekologie
These are the ball-jointed dragons made by CuartosDolls in Russia (at least I think it's Russia). They can be posed in almost any position thanks to every body segment having its own ball joint. Want one? Well you're in luck, because the maker is selling them, with white dragons going for €165 (~$220), and every other color including metallics for €240 (~$320).