Beheaded appear as an emaciated, decayed version of their original heads, with the moisture having been sucked out of them over time. Any severed head can be made into a beheaded, though medium and large humanoids are perhaps the most common.
Beheaded abilities can vary based on the conditions of their creation. Some, for example, constantly flame and spit fire. Others can grab at foes with their remaining hair. At base, however, most beheaded simply bite at and smash against their foes. Some particularly fiendish beheaded radiate auras of fear that must be overcome to destroy them. All beheaded are inherently able to fly.