He needs a higher polycount unless this is for a game, and he could use multiple blending textures and a better color scheme, the teeth could look rounder on the shaft while staying sharp on the tip.
Dragon what do you mean when say:“multiple blending textures”?
1 texture for 1 body part?
and I don’t know how to improve the “color scheme”. I tried to make bronze dragon - this is the best I could do (