ne tiny mindless undead 

Perception +6; darkvision

Skills Acrobatics +6 (+8 to Maneuver in Flight)

Str +1 Dex +2 Con +0 Int -5 Wis +2 Cha +0

AC  15; Fort +4, Ref +6, Will +4

HP 7, negative healing; Immunities mental, poison, death effects, disease, paralyzed, unconscious

Speed 15 feet, fly 25 feet

Melee [>] jaws +6 (agile, finesse), Damage 1d4+1 piercing

Gnash [>] Requirements The beheaded's previous action was a jaws Strike that dealt damage to its target; Effect The severed head makes a second jaws Strike as it violently tainobraies itself, trying to rip away a mouthful of flesh. On a success, the target takes an additional 1d4 slashing damage and 1 persistent bleed damage.

Bestiary 3, page 30.