It's been a while Shido but I'm glad to see another texture from you and for a unit which doesn't get many, you have created a complete and unique transformation, so let's dive straight in.
The Good:
This is a total transformation which is awesome to see and it relates to another unit which is also a very cool concept. the base is obviously the Ancient of Wind and in terms of look they fit perfectly side by side. So thematically this texture is perfect. On the art side it looks almost like it was made by the same guy that textured the ancient of wind, your cartoony style has translated into something that blends in completely with classic; I'm very impressed. In terms of the detailing we have lots of great shading and little nuances in the shape and flow of the wood, the leaves look great and the glow of the eyes has been pulled off flawlessly. There's also a nice amount of TC which is always appreciated and there's variation in the skin which stops it from being bland.
Areas for Improvement:
None that I can really see tbh, you could maybe sharpen some of the lines of the wood with just a black outline if you wanted to be a little bolder with the shadows but this is more of just my opinion and not a necessary change for quality and would simply be stylistic.
The only other thing is the Gargoyle like 80% of Warcraft units has a terrible wrap but you can't do anything about that.
Conclusion:
A great new texture with lots of use for a potential ancient race and with a style that blends seamlessly into the vanilla units, I hope you have more unique ideas like this up your sleeve
5/5.
In terms of moderation, I believe this deserves approval and a recommended rating.