Define "humanoid". I can find another picture of the same guy that makes his slime like nature less apparent, but the fact that he fights like an amorphous blob is important to his fighting style. I was thinking that it would be one his beginning skills which is akin to shapeshifting. Loses conventional weapon abilities (that is to say, can't really use weapons beyond swinging the sharp part at the bad guys) for various stat boosts and alternative skills that are classified as "unarmed" or "natural weapons".