this is Drach-Nahrr's demonic shape. a shape he can change to at will, his "true" shape so to say. the process of changing into this shape is extremely painful for him, wheras why he only does it when he gets very mad. the process of changing into this shape happens as following:
with extreme pain, his body will start to gradually build up power, his armor paltes, claws, horns etc will apear to slowly charr, until they are charcoal in color, instead of the normal golden color they often are. then, his front will grow thick armor, while his scales and feathers become longer, harder and gets a supersharp, blade-like edge. his demonic fire, as well, gets much more wild, and his eyes change.
then, with another burst of pain, his body undergoes an enormous increase in power, blasting off the left side of his frontal armor, while blasting huge holes in his scales on various parts of hie body, revealing the flesh underneath, which will radiate pure visible energy energy same as with his eyes in this state, and the crystaline structure on his chest.

this was drawn by my great mate  DarSaberclaw and colored by me. without shading because that would be very hard.

his redone stats can be read here: https://www.furaffinity.net/view/6350877/