Manuku

Big, scary, man, beast with features similar to a human, but they grow elongated bone, and muscle (anything from arm, legs, fingers, toes, even spine, and jaw). The creature is said to come out in the worst times, and are uncontrollable. They are human but they can change at anytime. They learn their name, and always have animal like instincts, those are the only two signs. No one knows if they are here to protect, or to destroy, it all depends.