Brainpan

A monster that is only a face which appears on the faraway Floating Continent. It has a constant, eerie grin on its face. Those who stare upon its face are said to be filled with such terror they are rendered motionless. The brainpan's true form is unknown, but given the fact it is now a lifeless reaper, it is thought that it might be the shell of a human who died for some reason, full of pain and regret.