Chaos Dragon - Warhammer Chaos and Conquest

Chaos Dragons were once members of the noble race of Dragons they were corrupted like all mortals can be, by the power of Chaos. A Chaos Dragon dimly resembles its uncorrupted kin.
It has a massive bloated body that splits into two long trunk-like necks that end in heads of horns and fangs. One head smokes with the fires that burn in its gullet, whilst the other sends plumes of acidic gasses into the air to scorch the land.
Thick scales cover the body in places, but in others, its organs and muscles are revealed, pumping the Chaos corruption through a system of exposed veins and arteries.