A slight movement in the dim light draws your attention to a creature of roiling darkness, its only identifying feature the pale likeness of a human face frozen in a moment of anguish where the thing’s face should be.
XP 3,200
LE Medium undead (incorporeal)
Init +8; Senses darkvision 60 ft., lifesense; Perception +13
AC 20, touch 20, flat-footed 16 (+6 deflection, +4 Dex)
hp 74 (7d8+42)
Fort +8, Ref +6, Will +7
Defensive Ability channel resistance +2, incorporeal; Immune undead traits
Weakness light discorporation
Speed fly 60 ft. (good)
Melee incorporeal touch +9 (2d6 negative energy plus 1d6 Con drain)
Space 5 ft.; Reach 5 ft.
Special Attacks create spawn
Str —, Dex 18, Con —, Int 14, Wis 14, Cha 23
Base Atk +5; CMB +9; CMD 19
Feats Blind-Sight, Combat Reflexes, Flyby Attack, Improved Initiative
Skills Diplomacy +14, Fly +7, Intimidate +17, Knowledge (planes) +10, Perception +13, Sense Motive +13, Stealth +15
Languages Common, Infernal
Environment any
Organization solitary, pair, gang (3–6), or pack (7–12)
Treasure none
Body of Darkness (Ex) In areas of darkness, the moon wraith can assume a corporeal form as a move action. The moon wraith’s body of darkness appears as a humanoid with a pair of boney claws, swaddled in black rags wearing a white clay mask. In this form, it loses the incorporeal subtype, its fly speed, and its incorporeal touch attack, but gains a +5 natural armor bonus (AC 19), speed of 30 feet, 2 claws (+11, 1d8+5 plus 1d6 Con drain), and a Strength score of 20. The moon wraith may resume its normal incorporeal form as a swift action, and automatically becomes incorporeal again should the level of illumination increase to dim light or brighter.
Create Spawn (Su) A humanoid slain by a moon wraith becomes a wraith in 1d4 rounds. These spawn are less powerful than typical wraiths, and suffer a –2 penalty on all d20 rolls and checks, receive –2 hp per HD, and only drain 1d2 points of Constitution on a touch. Spawn are under the command of the moon wraith that created them until its death, at which point they lose their spawn penalties and become free-willed wraiths. They do not possess any of the abilities they had in life.
Constitution Drain (Su) Creatures hit by a wraith's touch attack (or claw attacks in corporeal form, see body of darkness above) must succeed on a DC 19 Fortitude save or take 1d6 points of Constitution drain. This is a negative energy effect. On each successful attack, the wraith gains 5 temporary hit points. The save DC is Charisma-based.
Lifesense (Su) A wraith notices and locates living creatures within 60 feet, just as if it possessed the blindsight ability.
Light Discorporation (Ex) In areas of bright or normal light, the moon wraith cannot attack, becomes ethereal (as per the ethereal jaunt spell), and is staggered.
Unnatural Aura (Su) Animals do not willingly approach within 30 feet of a wraith, unless a master makes a DC 25 Handle Animal, Ride, or wild empathy check.

Moon wraiths are a rare variant of the standard wraith created when a wraith slays a humanoid during the night of a new moon an hour or two after midnight. In addition to being even more sensitive to light than a normal wraith, they also have the ability to coalesce into a corporeal form in the absence of light. Because of the way moon wraiths interact with light, they can often stalk a town or city completely unnoticed during the day, only glimpses of the wraith appearing to mortal eyes as it passes quickly through a shadow.

Knowledge (Religion) DC 17 This creature is a moon wraith, an incorporeal undead creature created during a new moon. These creatures suck the life force from their enemies with a touch and have a strong affinity for darkness.
Knowledge (Religion) DC 22 Moon wraiths can take on a particularly dangerous corporeal form in areas of darkness. However, they are all but helpless to affect the physical realm in areas of light.