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 head should be.
AC 20, touch 20, flat-footed 16 (+6 deflection, +4 Dex)
Speed fly 60 ft. (good)
Str —, Dex 18, Con —, Int 14, Wis 14, Cha 23
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 (total AC 19), a 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.
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.
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.
A wraith notices and locates living creatures within 60 feet, just as if it possessed the blindsight ability.