From Pathfinder Society Quest #15: In the Footsteps of Horror, which isn't enabled.

Elite Arisen Umbral Pixie

CREATURE 4

RARE SMALL CHAOTIC FEY SHADOW SPRITE UNDEAD UNHOLY

Perception +11; darkvision

Languages Common, Fey, Necril, Shadowtongue

Skills Acrobatics +13, Deception +11, Stealth +13

Str -3, Dex +5, Con +2, Int +0, Wis +0, Cha +4

Items Rapier

AC 20; Fort +8, Ref +14, Will +10

HP 70, void healing; Immunities bleed, death effects, disease, mental, paralyzed, poison, unconscious; Weaknesses cold iron 5, holy 2

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.

Speed 25 feet, fly 25 feet

Melee Claw +14 (agile, finesse, magical, unarmed), Damage 1d4+3 slashing

Melee Rapier +14 (deadly d8, disarm, finesse), Damage 1d6+3 slashing

Melee Shadow Spark +12, Damage 1d4+7 cold

Requires Shadowed Illumination

Shadowed Illumination (darkness, light, primal)

Umbral pixies exude shadow, counteracting all other light and darkness effects their level or lower to leave dim light out to 10 feet (counteract rank 4, counteract bonus +12). The shadow pixie can suppress this effect with a single action, which has the concentrate trait. While the effect is suppressed, the shadow pixie's Strikes don't deal cold damage and they can't use their shadow spark Strike.

Pathfinder Society Quest #15: In the Footsteps of HorrorOGL