Sketchbook of Markus Creation

[Markus Creation]

I made a drawing of a Dreadlord from the Warcraft-Universe.




Obviously the professional artist who invented that stuff make it look so much more awesome:




If anybody knows how to make the color more realistic, how to add more detaill and shading and how I could improve my version in the direction of the professional version, please let me know. If you know a tutorial or teacher, tell me.