Thanks for the review, I will return one in kind :)
I like the character and the scene has some good ominous feel to it. Making the character feel intimidating and mysterious. That being said they are some construction issues that deals with form and proportion. If I were to sum up one advice, use reference. The head is fine but arms, promotions and how they connect each other make the character stiff. Although practice will help. taking the time on what and how muscles are constructed will give the knowledge how to draw them in every angle. I would start with proportions then move your way to muscles. All in all, even though it needs work, I like the design and hope to see you improve.