I must say I know close to nothing about the different kinds of dragons, and the anatomy of them. I guess that's because of the lack of games that have dragons in them in my childhood.
Even though I know very little about dragons, I can imagine this being a great drawing. The scales look amazing, and the pointyness of basically everything about the dragon really fits. I also think that the difference in line thickness is great.
The fact that this piece of art has no colour makes it even more special. Because you made the dragon without colour, you made a picture that is different from most dragons.
The best thing about this picture is its style. You're really good if you can make shadows by just making some parts more detailed, which you did.
Basically the only thing I would've liked differently would be a more special boarder. It feels a bit simple compared to the detailed dragon. The fact that you made a border is good though, and if you would've made just the dragon would probably make me feel like there is something missing in this picture.
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