Monstrous Monday: The Umbral

Regardless of alignment or patron followed there is one philosophical belief that unites all witches. All witches believe in the cycle of life, death, and rebirth. Witches, all witches, are born, live, die and are reborn anew.  The most horrible thing to a witch then is to come back as an undead creature. Forever removed from the cycle of life, death, and rebirth an undead witch is a pitiable creature like no other.

A witch returning as an undead creature is known as an Umbral.

Umbral**
No. Appearing: 1 (1)
Move: 90' (30')
  Flying: 180' (60')
Armor Class: 7 [12]
Hit Dice: 4d8+2 (20hp)
Attack: Wail of Lament
Damage: CHA drain
Save: Witch 4
Morale: 12
Treasure Type: nil
Alignment: Chaotic (some Neutral)
XP: 300 (450 xp if fully destroyed)

An Umbral is a witch that has died and come back to unlife. Typically this is due to some great sadness or sorrow that prevents her from moving on.  The umbral is incorporeal and can only be hit by +1 or better weapons. A weapon of cold iron blessed by a cleric can also be used.
The umbral is locked to the area of their death or some other significant area.  Sages once tell of a Umbral that haunted the grounds her coven stood even though she had been killed many miles away.
The only attack of the umbral is a wail of lament.  All within 120' (240') that hear it must make a save vs. Death or loose 1 point of Cha.  The trauma of such an attack leaves a noticeable mark on the on the physical and emotional well being of the victim.   The Charisma damage can be restored by any magic that restores lost levels.
An umbral that is "killed" returns on the next new moon.  To fully destroy an umbral her mortal remains must be burned. This is why, sages say, so many witches are burned. To prevent their umbrals from haunting them.

Scholars also mention a greater umbral creature, a Shade.
In the same tomes that describe these creatures also describe a ritual to return an undead to life.

The umbral is turned as a spectre.  A turned umbral returns in three days. Destroying an umbral, even by dispelling/disruption still requires the burning of it's mortal remains.