I agree with Dathek. It does look like a Flesh Glolem, especially how it's coming out of the ground near a tombstone. Despite what it is, it's still a nice paintjob. Like heartwrom said, some shading would help it out.
Well, looks more like a flesh golem to me, especially with the whit eyes and black pupils....you may want to try and use a dark, heavil drybrushed (dirt feel) brown with glowing rewd eyes...thats my idea anyway! keep up the painting!