This one really pulls off the scary vibe well! I like the blueish greens contrasting with the yellow glowing eyes, and the direct gaze too. Also like how the horns frame the face in a way. Good luck in the challenge : )

 Thanks, it's a nice i tip! I've changed the eyes, it look more scary now :D

nice piece. I think it would make for a scarier piece if the eyes werea a tad wider and glaring directly at the viewer, right now they look a little subdued