treeform illusion doesn't always display as a tree. seems random but if it fails it just increases your size. you still have the same effects though (increased AC and Regen and rooted in place)
also, ghoul root overwrites treeform illusion. when the ghoul root wears off you no longer have the treeform buffs. In addition, you are now a moving tree (not just spinning on spot moving, but running around) I tend to play in third person and this meant i couldn't see where i was going
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