This is a really dynamic pose with some excellent detail. The over-the-top axe is still within the realm of possibility, which I like The bones and skulls are a good addition without being too dominating or large. I also really like the small highlights of color in his overall rustic costuming.
The one odd thing for me is the hand placement. As shown he's left handed and has just finished a swing, possibly to be followed up with a weaker backhanded swing or a spin of the weapon over his head to build some scary momentum. But the piece feels like he's meant to be about to swing forehand, and in that case his hand position is reversed from what it should be for an effective swing (right hand on top / closer to axe head). Possibly reversing the image would fix this
(For background, I'm an experienced stage and live combat practitioner familiarity in a wide variety of hand weapons.)
All that said, I adore your artwork and will be poring over your gallery for inspiration and general viewing pleasure. Thanks for posting these!