From Pathfinder #163: Ruins of Gauntlight, which isn't enabled.

Corpselight

CREATURE 2

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.

Perception +7; darkvision; corpse sense (precise) 30 feet

Languages Common, Necril

Skills Athletics +7, Intimidation +8, Stealth +8

Str +3, Dex +4, Con +1, Int +1, Wis +1, Cha +2

Corpse Sense (Precise) 30 feet

A corpselight can sense dead bodies within range. This is a precise sense that functions through solid barriers less than 5 feet thick.

AC 17; Fort +5, Ref +10, Will +7

HP 40, void healing; Immunities bleed, death effects, disease, fear effects, paralyzed, poison, precision, unconscious

Sunlight Powerlessness

A corpselight exposed to sunlight is Stunned 2 and Clumsy 2, and cannot Claim a Corpse.

Void Healing

A creature with void healing draws health from void energy rather than vitality energy. It is damaged by vitality damage and is not healed by vitality healing effects. It does not take void damage, and it is healed by void effects that heal undead.

Wisp Form

When a corpselight is reduced to 0 Hit Points while merged with a corpse, it is instead reduced to 1 Hit Point as the corpse collapses to the ground and the corpselight emerges in its wisp form.

While in wisp form, a corpselight is Tiny and can take no actions other than Claim Corpse or Fly.

A corpselight that starts its turn in wisp form must attempt a DC 16 flat check at the end of its turn; if it fails, it loses 1 Hit Point. A corpselight reduced to 0 Hit Points while in wisp form is destroyed.

Speed 25 feet, fly 25 feet

Melee Jaws +10 (unarmed), Damage 1d8+6 piercing

Melee Claw +10 (agile, unarmed), Damage 1d6+6 slashing

Claim Corpse

Prerequisites The corpselight is in wisp form and is adjacent to a Medium or Small corpse that hasn't been claimed by a corpselight in the past 24 hours

Effect The corpselight merges with the corpse, causes the corpse to Stand, and regains 3d6 healing Hit Points.

Effect: Claim Corpse - Fleshy

Effect: Claim Corpse - Skeletal

Death Light (emotion, fear, mental, occult)

Prerequisites The corpselight is in a corpse

Effect The corpselight emits a sickly blue beam of light from its mouth and eyes in a 20-foot cone. All living creatures in this area must attempt a DC 18 Fortitude saving throw. If at least 1 creature fails its save, the corpselight regains 2d6 healing Hit Points, gaining any that exceed its maximum as temporary Hit Points that last for 1 minute.

The corpselight can't use again for 1d4 rounds.

Critical Success The creature is unaffected.

Success The creature takes 1d6 void damage.

Failure The creature takes 2d6 void damage and is Frightened 1.

Critical Failure The creature takes 4d6 void damage and is Frightened 3.

Pathfinder #163: Ruins of GauntlightOGL