Corpselight

Creature 2
rareChaoticEvilUndeadUnholy
Perception +7; Darkvision (corpse sense (precise) 30 feet)
Skills Athletics +7, Intimidation +8, Stealth +8
CHA +2
CON +1
DEX +4
INT +1
STR +3
WIS +1

AC 17; Fort +5, Ref +10, Will +7
HP 40 void healing
Speed 25 feet, Fly 25 feet

A will-o'-wisp that starves to death might rise as a cold, blue, glowing sphere of spongy wetness-a corpselight. A corpselight instinctively seeks out a host corpse to dwell within, as its physical form quickly deteriorates if not hidden within a dead creature.