Arachnocephaly

So long as your head is above 0HP you may detach your head from your body. Your severed head becomes your new body scampering about on insectoid legs. Your head form has 10HP 2AV and is immune to hamstring. You retain any head natural weapons. You cannot equip or use items. You may attach your head form to a recently dead or incapacitated body, decapitating it in the process. Your new body becomes yours at critical HP and is unable to act for the remainder of combat. You may not reattach to a body you have attached to previously.