Orange glowing body parts, sharp teeth and claws, and extended wings... I don't think anyone could ask for a more intimidating design than this.
Especially the glowing eyes with the narrow lizard-like eye-slits.
The glowy orange-yellow effect looks nice against the cool blue-black background, as it contrasts against the background strongly, making it appear more vibrant.
I like the blur effects around his claws, it shows the rapid movement quite well... and good work on the scales! I imagine it was tedious work to draw every scale repeatedly.
What's Miltar's personality like?