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

Shadowborn Slayer

CREATURE 1

UNCOMMON MEDIUM EVIL UNDEAD UNHOLY

Perception +5; darkvision

Languages Common, Necril

Skills Acrobatics +7, Athletics +4, Stealth +7

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

Items Dagger

AC 15; Fort +5, Ref +10, Will +4

HP 21, void healing; Immunities bleed, death effects, disease, paralyzed, poison, unconscious; Weaknesses vitality 3

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

Melee Dagger +9 (agile, finesse, thrown, versatile s), Damage 1d4+2 piercing

Melee Fist +9 (agile, unarmed), Damage 1d4+2 bludgeoning

Melee Dagger +9 (thrown 20), Damage 1d4 piercing

Sneak Attack

The creature's Strikes deal an additional 1d6 precision damage to Off-Guard creatures.

Pathfinder Society Quest #15: In the Footsteps of HorrorOGL