With the latest Patch 10.1 PTR build, a new Highland Drake customization has been discovered! The Elementium Drake full transformation will change your Highland Drake to look like Kazzara, the first boss in the Aberrus, the Shadowed Crucible raid.
It is currently unknown which boss in the Aberrus raid will have this customization – Kazzara is the first boss in the raid, but Blizzard could move the drop to the final boss of the raid, Scalecommander Sarkareth.