...the Monster Tree looks interesting.
C&C:
The hand portions stand out, and are easily identified from a distance. Actually,
the bare limbs, that terminate abruptly, make the attacking limbs even more obvious.
I suggest taking the time to model limbs & branches that taper uniformly into long
finger-like twigs, throughout, and animating those that will function as hand-like
appendages. Doing so will improve the look and effectiveness of this character
immensely.
I'm assuming that the element of surprise would be critical in the effective use of this
character. Camouflaging and blending the Monster Tree in with other static
trees would best showcase the Monster Tree's skills.