Evil Ents! Oh no...
While I would love to give Mr. V a good rough time criticizing this monster, I don't think this is that bad. Some of the mechanics are off (what? like you don't have friends to check it for you?), but overall I think the idea is steeped in lore, and can lead to some tangential adventures, like being chased by the crazy alchemist (but really, what alchemist isn't?) for the bones that the PCs now possess.
I will be voting for this