Beheaded

Beheaded are the reanimated heads of decapitation victims. These mindless undead fly through the air or roll around to attack their prey.

Flaming Skull (Creature 2), Severed Head (Creature -1)

Since beheaded are very similar to skeletons or zombies (or at least the heads from those creatures), you can also customize them with abilities from the skeleton and zombie entries, though take care to avoid abilities that require bodies or limbs. If you give the beheaded more than one additional ability, you might want to increase its level and adjust its statistics accordingly. Use the guidelines here to determine to determine its new statistics.