I would be interested to see this shot in different lighting so the shadows are not so hard. More diffuse light might show the facial(?) features a little more.
I like that you've found something completely natural and strange in keeping with the challenge. The angle you chose really brings out the facial features. It would be even better if the leaf were removed from in front of the "eye" and the picture didn't look so... (sharpened?).
I see the face, but the colours...
It seems so plastic or unnatural. Harsh
The title destroys the atmosphere. Maybe "The ent king" would suffice.
I would go for warmer colours.
I think a shallower DOF to blur the background would have really made this a WOW photo. As is, it's kind of hard to focus on the profile - my eyes keep going to the little tree on the left. 7